Re: Am I missing something?
We had to tell Cheshire to always use bigdecimals - and I think there was something else, can't remember. Not all that advanced, really. On 4 Dec 2013 16:17, Brian Craft craft.br...@gmail.com wrote: On Tuesday, December 3, 2013 8:48:34 PM UTC-8, Korny wrote: * Compojure for routing, and static resources - the only middleware we had to write was for advanced json parsing What is advanced json parsing? -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [ANN] Buffy The ByteBuffer Slayer, Clojure library to working with binary data
While we're on the subject, I found no way of decoding/interpreting an already existing sequence (ByteBuffer) of bytes, but only one that had been created with compose-buff. Am I missing something? On 4 December 2013 07:28, Cesar Canassa cesar.cana...@gmail.com wrote: Hi, I see that the repeated-type requires a constant repeat count. Are you planning to include a more dynamic version à la Gloss prefixes/headers? The lib looks really nice. Binary handling libraries are really helpful. Thanks, Cesar Canassa On Mon, Dec 2, 2013 at 7:09 PM, Alex P oleksandr.pet...@gmail.com wrote: It's different in a way we manipulate the data: We've opted out for default-lazy way (you're getting and setting separate values instead of serialising/deserialising an entire payload). Another difference is that we don't have Lamina as a loaded artifact (which may not be an issue for majority of people, but was for us because of an internal version conflict with some other library). Obviously, there are ways around it, but we tried to bring in minimum possible amount of dependencies, and be able to use it with Netty4 (which is currently underrepresented in Clojure world). There are other subtle difference, but I don't think they're worth mentioning, Gloss is a great library, but Buffy is doing things in a subtly different way. Main purpose (as we're using it) - for off-heap storage / data structures, and for binary protocol implementations in Clojure (right now, we have a sketch of Cassandra binary protocol implemented on top of Buffy, although I'm not sure wether it's going to be production-ready any time soon). Thanks for props! On Saturday, November 30, 2013 10:33:31 PM UTC+1, Thomas wrote: Looks really really great and could you please explain how it differs from gloss [1]. Any advantages? Disadvantages? Thanks Thomas [1] https://github.com/ztellman/gloss On Friday, November 29, 2013 10:15:45 PM UTC, Alex P wrote: Buffy [1] is a Clojure library to work with Binary Data, write complete binary protocol implementations in clojure, store your complex data structures in an off-heap chache, read binary files and do everything you would usually do `ByteBuffer`. Main features motivation to write it * partial deserialization (read and deserialise parts of a byte buffer) * named access (access parts of your buffer by names) * composing/decomposing from key/value pairs * pretty hexdump * many useful default types that you can combine and extend easily Data types include: * primitives, such as `int32`, `boolean`, `byte`, `short`, `medium`, `float`, `long` * arbitrary-length `string` * byte arrays * composite types (combine any of primitives together) * repeated type (repeat any primitive arbitrary amount of times in payload) * enum type (for mapping between human-readable and binary representation of constants) Buffy has been serving us well for recent time, and no major issues were revealed. However, until it reaches GA, we can't guarantee 100% backward compatibility, although we're thought it through very well and used our best knowledge to make it right. Buffy is a ClojureWerkz project, same as Monger, Elastisch, Cassaforte, Neocons, Meltdown and many others. [1] https://github.com/clojurewerkz/buffy [2] http://clojurewerkz.org -- Alex P http://clojurewerkz.org http://twitter.com/ifesdjeen -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to
Re: Am I missing something?
On 3 Dec 2013 23:28, James Laver james.la...@gmail.com wrote: Some examples: 1. The :params key is used by ring.middleware.params, compojure and ring.middleware.format so it's impossible to know where a given param is coming from 2. ring.middleware.params does not provide a convenience map that merges :query-params and :form-params, despite being happy to stuff everything into :params. At least ring.middleware.format adds :body-params here. I've now written a middleware to do this. 3. ring.middleware.keyword-params only keywordises the :params map, not the other maps. There is no configurable behaviour to ask it to do other maps. I've now written a middleware for this It sounds like part of the issue is with ring.middleware.format overloading the :params key, but it also seems like you might have an unusual set of requirements. The custom middleware you describe sounds like one or two lines of code. Did you find it took particularly long to write? Others have mentioned Liberator, which I'd highly recommend using for RESTful web services. It gets rid of a lot of the boilerplate required, at least the parts that deal with HTTP. - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Am I missing something?
On 4 Dec 2013, at 09:06, James Reeves ja...@booleanknot.com wrote: It sounds like part of the issue is with ring.middleware.format overloading the :params key, but it also seems like you might have an unusual set of requirements. Actually, my larger problem was with compojure doing it. I wanted a distinction between data coming from the route and data coming from the form data, since after vaidation, that gets shoved straight into the database. The custom middleware you describe sounds like one or two lines of code. Did you find it took particularly long to write? Ring is really wonderfully simple. the two combined take up only a handful of lines. Unfortunately, the tests take up rather a lot of lines (~140) and since they helped squeeze out the bugs, it would be a poor argument to say “don’t write them”. See the source here https://gist.github.com/jjl/7785497 Others have mentioned Liberator, which I'd highly recommend using for RESTful web services. It gets rid of a lot of the boilerplate required, at least the parts that deal with HTTP. I think I’m going to have to look into it more fully. James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Am I missing something?
On 4 Dec 2013, at 05:00, David Nolen dnolen.li...@gmail.com wrote: Did you look at Caribou? It seems more like a complete solution - http://let-caribou.in I’ve now given this a look over. It seems insane. It makes quite a lot of (IMO) questionable choices and it doesn’t seem terribly pluggable. James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Am I missing something?
On Wednesday, December 4, 2013 at 12:37, James Laver wrote: Ring is really wonderfully simple. the two combined take up only a handful of lines. Unfortunately, the tests take up rather a lot of lines (~140) and since they helped squeeze out the bugs, it would be a poor argument to say “don’t write them”. See the source here https://gist.github.com/jjl/7785497 Just a humble suggestion, but from a cursory glance at your tests, it seems that something like simple-check might save you a lot of time in the future: https://github.com/reiddraper/simple-check Cheers, Josh -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
contains? and transient set
Does contains? and get not work with transient sets?
Examples:
(contains? #{1 2 3} 1)
; = true
(contains? (transient #{1 2 3}) 1)
; = IllegalArgumentException contains? not supported on type:
clojure.lang.PersistentHashSet$TransientHashSet
(get #{1 2 3} 1)
; = 1
(get (transient #{1 2 3}) 1)
; = nil
How can I check whether an element is contained in a transient set?
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Re: Am I missing something?
On 4 Dec 2013, at 11:00, Joshua Ballanco jball...@gmail.com wrote: Just a humble suggestion, but from a cursory glance at your tests, it seems that something like simple-check might save you a lot of time in the future: https://github.com/reiddraper/simple-check That’s a much valued suggestion actually. I had been missing Haskell’s QuickCheck. Cheers, James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: contains? and transient set
Hi,
contains? is for checking whether a data structure contains the respective
key.
A more idiomatic way to check whether an element is in the set is
(#{1 2 3} 1) ;; = returns 1
(#{1 2 3} 0) ;; = returns nil
works for (transient #{1 2 3}) too.
Las
2013/12/4 Burt burkhardt.r...@googlemail.com
Does contains? and get not work with transient sets?
Examples:
(contains? #{1 2 3} 1)
; = true
(contains? (transient #{1 2 3}) 1)
; = IllegalArgumentException contains? not supported on type:
clojure.lang.PersistentHashSet$TransientHashSet
(get #{1 2 3} 1)
; = 1
(get (transient #{1 2 3}) 1)
; = nil
How can I check whether an element is contained in a transient set?
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László Török
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Re: Am I missing something?
On 4 December 2013 10:37, James Laver james.la...@gmail.com wrote:
On 4 Dec 2013, at 09:06, James Reeves ja...@booleanknot.com wrote:
It sounds like part of the issue is with ring.middleware.format
overloading the :params key, but it also seems like you might have an
unusual set of requirements.
Actually, my larger problem was with compojure doing it. I wanted a
distinction between data coming from the route and data coming from the
form data, since after vaidation, that gets shoved straight into the
database.
Compojure also adds to the :route-params key, so if you need to, you can
explicitly decide how you want maps of parameters to be merged. The :params
key is just there for the convenience of the majority of users.
You could write something like:
(POST /blah/:id [id :as {params :form-params}] ...)
This would get the id from the routes (as they're always merged last), and
the parameters map from :form-params.
- James
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Re: contains? and transient set
Thanks, Burt -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: contains? and transient set
It looks like you're onto something here
get works with transient maps:
(get (transient {:a 1 :b 2}) :a)
;= 1
and with transient vectors, too:
(get (transient [1 2 3]) 0)
;= 1
but not with transient sets:
(get (transient #{1 2 3}) 2)
;= nil
And using contains? in a reduce with a transient accumulator does not seem
too far fetched to me.
According to clojure.org/transients: Transients support the read-only
interface of the source, i.e. you can call *nth*, *get*, *count* and
fn-call a transient vector, just like a persistent vector.
Did you search in Jira whether this is a known issue?
Regards,
Stefan
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Re: contains? and transient set
Also it seems it used to work on clojure 1.4
On Wednesday, December 4, 2013 2:29:35 PM UTC+1, Stefan Kamphausen wrote:
It looks like you're onto something here
get works with transient maps:
(get (transient {:a 1 :b 2}) :a)
;= 1
and with transient vectors, too:
(get (transient [1 2 3]) 0)
;= 1
but not with transient sets:
(get (transient #{1 2 3}) 2)
;= nil
And using contains? in a reduce with a transient accumulator does not seem
too far fetched to me.
According to clojure.org/transients: Transients support the read-only
interface of the source, i.e. you can call *nth*, *get*, *count* and
fn-call a transient vector, just like a persistent vector.
Did you search in Jira whether this is a known issue?
Regards,
Stefan
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Re: contains? and transient set
Well not quite:
(contains? (transient #{1 2 3}) 1)
false
*clojure-version*
{:major 1, :minor 4, :incremental 0, :qualifier nil}
So it used not to throw but return a wrong value instead, which was worse.
On Wednesday, December 4, 2013 2:50:19 PM UTC+1, Max Penet wrote:
Also it seems it used to work on clojure 1.4
On Wednesday, December 4, 2013 2:29:35 PM UTC+1, Stefan Kamphausen wrote:
It looks like you're onto something here
get works with transient maps:
(get (transient {:a 1 :b 2}) :a)
;= 1
and with transient vectors, too:
(get (transient [1 2 3]) 0)
;= 1
but not with transient sets:
(get (transient #{1 2 3}) 2)
;= nil
And using contains? in a reduce with a transient accumulator does not
seem too far fetched to me.
According to clojure.org/transients: Transients support the read-only
interface of the source, i.e. you can call *nth*, *get*, *count* and
fn-call a transient vector, just like a persistent vector.
Did you search in Jira whether this is a known issue?
Regards,
Stefan
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Re: Clojure for the Brave and True, an online book for beginners
It definitely was Daniel. I will be sure to recommend it to anyone I know looking to learn Clojure in London. I look forward to reading more of your blog. Have a great Christmas and New Year :) Patrick On Monday, December 2, 2013 2:25:55 PM UTC, Daniel Higginbotham wrote: Thanks, Paddy! It's very encouraging to hear such positive feedback :) I'm glad it was useful for you! Daniel On Sunday, December 1, 2013 7:51:35 PM UTC-5, Paddy Gallagher wrote: Daniel, I've just finished reading this series and thought it was superb. The Emacs chapters in particular were a massive help. I'm a complete newbie with Emacs and the detail here was pitched just perfectly. It got me exactly what I needed to start to become productive very quickly. I highly recommend it as a resource both for the excellent content/philosophy and humour :) It personally made my introductory Clojure learning experience a very enjoyable one. Thanks Daniel and hello from London :) cheers Paddy On Monday, September 2, 2013 4:35:52 PM UTC+1, Daniel Higginbotham wrote: Hi all, I've been putting together http://www.braveclojure.com/ and would love feedback. I've tried to make it entertaining and super beginner-friendly. Thanks! Daniel -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Am I missing something?
On 4 Dec 2013, at 11:38, James Reeves ja...@booleanknot.com wrote:
Compojure also adds to the :route-params key, so if you need to, you can
explicitly decide how you want maps of parameters to be merged. The :params
key is just there for the convenience of the majority of users.
You could write something like:
(POST /blah/:id [id :as {params :form-params}] ...)
This would get the id from the routes (as they're always merged last), and
the parameters map from :form-params.
Hi James,
I’m pretty sure that’s the behaviour I was already seeing. Imagine this
scenario:
- I access this route passing in the ID of the database record I wish to modify
- I pass in a new value for it in the post data (okay, bad example, you’re not
likely to want to change an integer primary key, but bear with me)
- I then need access to not only the value of the id from the params but also
the value from the post data, separately
- :form-params uses string keys not keywords so it then needs to be
keywordified before it’s suitable for passing to the database layer (not to
mention to make it significantly less of a pain to work with in userland code)
I think it’s mostly the effect of trying to use all of the pieces together
that’s causing me some pain. I’ve now worked around it with the middleware I
previously posted, but it was a little surprising that I had to.
Would you mind please explaining:
a: how that syntax deals with merges? I don’t quite understand what’s going on
underneath. Does that actually bind to params?
b: how i could get those params extracted into a variable as well as access to
the request map?
Cheers,
James
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Re: [ANN] Buffy The ByteBuffer Slayer, Clojure library to working with binary data
Thank you Alex, I have been paying around with Gloss for a while now and realised it is not quite suitable for the protocol I am trying to en/decode. I'll give Buffy a try and see whether it is a better fit for my problem domain. Thanks again, Thomas On Monday, December 2, 2013 9:09:48 PM UTC, Alex P wrote: It's different in a way we manipulate the data: We've opted out for default-lazy way (you're getting and setting separate values instead of serialising/deserialising an entire payload). -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [ANN] Buffy The ByteBuffer Slayer, Clojure library to working with binary data
On 29 November 2013 22:15, Alex P oleksandr.pet...@gmail.com wrote: Buffy [1] is a Clojure library to work with Binary Data, write complete binary protocol implementations in clojure, store your complex data structures in an off-heap chache, read binary files and do everything you would usually do `ByteBuffer`. Is there any plan to support bit-fields? My main interest at present is the Diameter protocol, where some individual bits in the header are true/false flags - Gloss decodes that nicely into a sequence of bools, but I can't see similar support in Buffy. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: contains? and transient set
Hi Stefan,
I did not search in Jira, I don't know whether this is a known bug.
I use the Lars' work-around in the context I need contains? with a
transient set.
Regards,
Burt
Am Mittwoch, 4. Dezember 2013 14:29:35 UTC+1 schrieb Stefan Kamphausen:
It looks like you're onto something here
get works with transient maps:
(get (transient {:a 1 :b 2}) :a)
;= 1
and with transient vectors, too:
(get (transient [1 2 3]) 0)
;= 1
but not with transient sets:
(get (transient #{1 2 3}) 2)
;= nil
And using contains? in a reduce with a transient accumulator does not seem
too far fetched to me.
According to clojure.org/transients: Transients support the read-only
interface of the source, i.e. you can call *nth*, *get*, *count* and
fn-call a transient vector, just like a persistent vector.
Did you search in Jira whether this is a known issue?
Regards,
Stefan
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Re: contains? and transient set
Both contains? and get should work with transient sets imo.
This is already in jira: http://dev.clojure.org/jira/browse/CLJ-700.
Alex
On Wednesday, December 4, 2013 5:04:40 AM UTC-6, Burt wrote:
Does contains? and get not work with transient sets?
Examples:
(contains? #{1 2 3} 1)
; = true
(contains? (transient #{1 2 3}) 1)
; = IllegalArgumentException contains? not supported on type:
clojure.lang.PersistentHashSet$TransientHashSet
(get #{1 2 3} 1)
; = 1
(get (transient #{1 2 3}) 1)
; = nil
How can I check whether an element is contained in a transient set?
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Re: contains? and transient set
This is not a good way to check whether an *arbitrary* element is in a set:
user= (contains? #{nil} nil)
true
user= (#{nil} nil)
nil
On Wed, Dec 4, 2013 at 3:35 AM, László Török ltoro...@gmail.com wrote:
Hi,
contains? is for checking whether a data structure contains the respective
key.
A more idiomatic way to check whether an element is in the set is
(#{1 2 3} 1) ;; = returns 1
(#{1 2 3} 0) ;; = returns nil
works for (transient #{1 2 3}) too.
Las
2013/12/4 Burt burkhardt.r...@googlemail.com
Does contains? and get not work with transient sets?
Examples:
(contains? #{1 2 3} 1)
; = true
(contains? (transient #{1 2 3}) 1)
; = IllegalArgumentException contains? not supported on type:
clojure.lang.PersistentHashSet$TransientHashSet
(get #{1 2 3} 1)
; = 1
(get (transient #{1 2 3}) 1)
; = nil
How can I check whether an element is contained in a transient set?
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Re: contains? and transient set
cool! hope the patch is good for 1.6! :)
2013/12/4 Alex Miller a...@puredanger.com
Both contains? and get should work with transient sets imo.
This is already in jira: http://dev.clojure.org/jira/browse/CLJ-700.
Alex
On Wednesday, December 4, 2013 5:04:40 AM UTC-6, Burt wrote:
Does contains? and get not work with transient sets?
Examples:
(contains? #{1 2 3} 1)
; = true
(contains? (transient #{1 2 3}) 1)
; = IllegalArgumentException contains? not supported on type:
clojure.lang.PersistentHashSet$TransientHashSet
(get #{1 2 3} 1)
; = 1
(get (transient #{1 2 3}) 1)
; = nil
How can I check whether an element is contained in a transient set?
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ClassCastException on second pass of loop, works fine during the first.
Greetings ! I'm attempting to implement Othello in Clojure and I've run into a problem when actually running my game loop. On the first run through, everything works as expected, the black player can make their move, the board is updated and everything is awesome. However when the program loops and it is the white players turn, after they have entered their move the program crashes with the stacktrace at the bottom of this message.. I seem to be having a brain fuzz moment because I can't see how much application would complete happily the first time through without error, then when the nearly identical steps are taken for turn two, I seem to have a type error. The code is here: https://github.com/mankyKitty/clojure-othello/blob/master/src/othello/core.clj . I know it's not great, work in progress! :) From what I can tell from the ST the error is from my squares-to-flip function but I'm unable to reproduce the results in the repl, and I've yet to reach the point where I'm adding a print on every second line (though I'm close). I had originally deduced it was the 'merge' call on the times I would have an empty second argument, hence the 'if' in there but that doesn't appear to have helped at all. I assume it's something I've not anticipated or accounted for with respect to my loop, but I'm not quite sure.. Thanks in advance ! --- STACKTRACE --- Exception in thread main java.lang.ClassCastException: clojure.lang.PersistentHashMap cannot be cast to java.util.Map$Entry at clojure.lang.APersistentMap.cons(APersistentMap.java:42) at clojure.lang.RT.conj(RT.java:562) at clojure.core$conj.invoke(core.clj:83) at clojure.core$merge$fn__4275.invoke(core.clj:2684) at clojure.core$reduce1.invoke(core.clj:896) at clojure.core$reduce1.invoke(core.clj:887) at clojure.core$merge.doInvoke(core.clj:2684) at clojure.lang.RestFn.invoke(RestFn.java:421) at othello.core$squares_to_flip.invoke(core.clj:186) at othello.core$game_loop.invoke(core.clj:213) at othello.core$_main.doInvoke(core.clj:225) at clojure.lang.RestFn.invoke(RestFn.java:397) at clojure.lang.Var.invoke(Var.java:411) at user$eval5$fn__7.invoke(form-init5981136443637675542.clj:1) at user$eval5.invoke(form-init5981136443637675542.clj:1) at clojure.lang.Compiler.eval(Compiler.java:6619) at clojure.lang.Compiler.eval(Compiler.java:6609) at clojure.lang.Compiler.load(Compiler.java:7064) at clojure.lang.Compiler.loadFile(Compiler.java:7020) at clojure.main$load_script.invoke(main.clj:294) at clojure.main$init_opt.invoke(main.clj:299) at clojure.main$initialize.invoke(main.clj:327) at clojure.main$null_opt.invoke(main.clj:362) at clojure.main$main.doInvoke(main.clj:440) at clojure.lang.RestFn.invoke(RestFn.java:421) at clojure.lang.Var.invoke(Var.java:419) at clojure.lang.AFn.applyToHelper(AFn.java:163) at clojure.lang.Var.applyTo(Var.java:532) at clojure.main.main(main.java:37) -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Am I missing something?
On 4 December 2013 14:04, James Laver james.la...@gmail.com wrote: I’m pretty sure that’s the behaviour I was already seeing. Imagine this scenario: - I access this route passing in the ID of the database record I wish to modify - I pass in a new value for it in the post data (okay, bad example, you’re not likely to want to change an integer primary key, but bear with me) - I then need access to not only the value of the id from the params but also the value from the post data, separately - :form-params uses string keys not keywords so it then needs to be keywordified before it’s suitable for passing to the database layer (not to mention to make it significantly less of a pain to work with in userland code) Surely that's only a problem if you choose names for your route parameters that conflict with your form parameters? I think it’s mostly the effect of trying to use all of the pieces together that’s causing me some pain. I’ve now worked around it with the middleware I previously posted, but it was a little surprising that I had to. Would you mind please explaining: a: how that syntax deals with merges? I don’t quite understand what’s going on underneath. Does that actually bind to params? b: how i could get those params extracted into a variable as well as access to the request map? The code sample demonstrates using normal Clojure destructuring with Compojure's more specialised kind. I wasn't merging anything, I was just pulling out the form parameters and a parameter named id. This is covered in more detail in the Compojure wiki: https://github.com/weavejester/compojure/wiki/Destructuring-Syntax - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Quick library status updates (logging, Redis, i18n, etc.)
Hi all, quick batched update on some libs that I'm maintaining: *Timbre - v3.0.0-RC2 - 2013-12-04* == Logging profiling tools Major recent changes: * Carmine (Redis) appender that serializes log entries to length-limited, rotating lists by log level. Allows easy querying+manipulation of log as a Clojure value: the log is just a vector of ordered maps. Works great with Datomic's query engine, or regular seq fns (filter, group-by, sort-by, etc.). * Support for ad hoc logging config - no longer reliant on a global config atom (though it's still there for convenience). * Appender rate limiter has been made a lot more flexible, useful by default. https://github.com/ptaoussanis/timbre https://github.com/ptaoussanis/timbre/blob/master/CHANGELOG.md http://ptaoussanis.github.io/timbre/ - API docs *Carmine v2.4.0 - 2013-11-18* === Redis client message queue Major recent changes: * Completely rewrote message queue system - numerous big improvements, incl. important reliability improvements. * Completely rewrote reply parsing system for robustness + flexibility. * Brought Tundra out of alpha, added S3 datastore. Allows automatic data replication to a secondary data store, and an option to automatically evict cold keys from memory. Basically provides a convenient way of running Redis against much larger datasets than can fit in memory. * Big improvements to atomic operations API - everything has been unified behind a single interface. * A ton of other small improvements, including bug fixes. https://github.com/ptaoussanis/carmine https://github.com/ptaoussanis/carmine/blob/master/CHANGELOG.md http://ptaoussanis.github.io/carmine/ - API docs *Nippy v2.5.1 - 2013-12-04* = Extendable, high-performance, binary serialization Major recent changes: * Continued performance work. Think it's ballpark about as fast as it's going to get. * LZMA2 very-high-compression compressor (ahem). * New Java Serializable fallback support. Basically serializes anything you can throw at it - will select the best available method. Notably Throwables of all types are now covered. https://github.com/ptaoussanis/nippy https://github.com/ptaoussanis/nippy/blob/master/CHANGELOG.md http://ptaoussanis.github.io/nippy/ - API docs *Tower v2.0.1 - 2013-11-06* = Internationalisation (i18n) and localisation (L10n) tools Major recent changes: * Stable. https://github.com/ptaoussanis/tower https://github.com/ptaoussanis/tower/blob/master/CHANGELOG.md http://ptaoussanis.github.io/tower/ - API docs *Faraday v1.0.1 - 2013-12-04* == Amazon DynamoDB client Major recent changes: * Went 1.0, production-ready. https://github.com/ptaoussanis/faraday https://github.com/ptaoussanis/faraday/blob/master/CHANGELOG.md http://ptaoussanis.github.io/faraday/ - API docs *Touchstone v2.0.1 - 2013-11-25* = High performance, rapidly converging A/B testing tool Major recent changes: * Stable. https://github.com/ptaoussanis/touchstone https://github.com/ptaoussanis/touchstone/blob/master/CHANGELOG.md http://ptaoussanis.github.io/touchstone/ - API docs *General status* Tower still requires Clourescript dictionary support - hope to find some time to look into that in the coming weeks. Carmine's got a bunch of changes coming up to support Redis Cluster Sentinel - though I'm waiting on the specs there to get finalised first. Everything else should (hopefully) stay more or less stable from here (modulo bugs). Carmine's in good shape as of v2.4. Timbre's in good shape as of v3, though the RC will need some time to settle before I'm confident it's good for production. Ahh- yeah, nothing else I can think of. Hit me up if you have any questions/problems/wanna-say-hi/whatever. Cheers! :-) -- *Peter Taoussanis*ptaoussanis at gmail.com https://twitter.com/ptaoussanis -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Quick library status updates (logging, Redis, i18n, etc.)
Fantastic stuff, Peter. Your projects are extremely useful, well designed and have great docs. Your work is really inspiring. ~BG Sent from phone. Please excuse brevity. On 4 Dec 2013 23:00, Peter Taoussanis ptaoussa...@gmail.com wrote: Hi all, quick batched update on some libs that I'm maintaining: *Timbre - v3.0.0-RC2 - 2013-12-04* == Logging profiling tools Major recent changes: * Carmine (Redis) appender that serializes log entries to length-limited, rotating lists by log level. Allows easy querying+manipulation of log as a Clojure value: the log is just a vector of ordered maps. Works great with Datomic's query engine, or regular seq fns (filter, group-by, sort-by, etc.). * Support for ad hoc logging config - no longer reliant on a global config atom (though it's still there for convenience). * Appender rate limiter has been made a lot more flexible, useful by default. https://github.com/ptaoussanis/timbre https://github.com/ptaoussanis/timbre/blob/master/CHANGELOG.md http://ptaoussanis.github.io/timbre/ - API docs *Carmine v2.4.0 - 2013-11-18* === Redis client message queue Major recent changes: * Completely rewrote message queue system - numerous big improvements, incl. important reliability improvements. * Completely rewrote reply parsing system for robustness + flexibility. * Brought Tundra out of alpha, added S3 datastore. Allows automatic data replication to a secondary data store, and an option to automatically evict cold keys from memory. Basically provides a convenient way of running Redis against much larger datasets than can fit in memory. * Big improvements to atomic operations API - everything has been unified behind a single interface. * A ton of other small improvements, including bug fixes. https://github.com/ptaoussanis/carmine https://github.com/ptaoussanis/carmine/blob/master/CHANGELOG.md http://ptaoussanis.github.io/carmine/ - API docs *Nippy v2.5.1 - 2013-12-04* = Extendable, high-performance, binary serialization Major recent changes: * Continued performance work. Think it's ballpark about as fast as it's going to get. * LZMA2 very-high-compression compressor (ahem). * New Java Serializable fallback support. Basically serializes anything you can throw at it - will select the best available method. Notably Throwables of all types are now covered. https://github.com/ptaoussanis/nippy https://github.com/ptaoussanis/nippy/blob/master/CHANGELOG.md http://ptaoussanis.github.io/nippy/ - API docs *Tower v2.0.1 - 2013-11-06* = Internationalisation (i18n) and localisation (L10n) tools Major recent changes: * Stable. https://github.com/ptaoussanis/tower https://github.com/ptaoussanis/tower/blob/master/CHANGELOG.md http://ptaoussanis.github.io/tower/ - API docs *Faraday v1.0.1 - 2013-12-04* == Amazon DynamoDB client Major recent changes: * Went 1.0, production-ready. https://github.com/ptaoussanis/faraday https://github.com/ptaoussanis/faraday/blob/master/CHANGELOG.md http://ptaoussanis.github.io/faraday/ - API docs *Touchstone v2.0.1 - 2013-11-25* = High performance, rapidly converging A/B testing tool Major recent changes: * Stable. https://github.com/ptaoussanis/touchstone https://github.com/ptaoussanis/touchstone/blob/master/CHANGELOG.md http://ptaoussanis.github.io/touchstone/ - API docs *General status* Tower still requires Clourescript dictionary support - hope to find some time to look into that in the coming weeks. Carmine's got a bunch of changes coming up to support Redis Cluster Sentinel - though I'm waiting on the specs there to get finalised first. Everything else should (hopefully) stay more or less stable from here (modulo bugs). Carmine's in good shape as of v2.4. Timbre's in good shape as of v3, though the RC will need some time to settle before I'm confident it's good for production. Ahh- yeah, nothing else I can think of. Hit me up if you have any questions/problems/wanna-say-hi/whatever. Cheers! :-) -- *Peter Taoussanis*ptaoussanis at gmail.com https://twitter.com/ptaoussanis -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message
Re: ClassCastException on second pass of loop, works fine during the first.
I would expect others to be either nil or a non-empty seq (never empty) but empty? will return true on a nil, so that still works. I would have swapped the cases and used seq as the test. However, without really reading this too closely, I'd guess the real problem is that you want to (apply merge fst others) since others is a seq of maps. On Wednesday, December 4, 2013 10:24:42 AM UTC-6, Sean Chalmers wrote: Greetings ! I'm attempting to implement Othello in Clojure and I've run into a problem when actually running my game loop. On the first run through, everything works as expected, the black player can make their move, the board is updated and everything is awesome. However when the program loops and it is the white players turn, after they have entered their move the program crashes with the stacktrace at the bottom of this message.. I seem to be having a brain fuzz moment because I can't see how much application would complete happily the first time through without error, then when the nearly identical steps are taken for turn two, I seem to have a type error. The code is here: https://github.com/mankyKitty/clojure-othello/blob/master/src/othello/core.clj. I know it's not great, work in progress! :) From what I can tell from the ST the error is from my squares-to-flip function but I'm unable to reproduce the results in the repl, and I've yet to reach the point where I'm adding a print on every second line (though I'm close). I had originally deduced it was the 'merge' call on the times I would have an empty second argument, hence the 'if' in there but that doesn't appear to have helped at all. I assume it's something I've not anticipated or accounted for with respect to my loop, but I'm not quite sure.. Thanks in advance ! --- STACKTRACE --- Exception in thread main java.lang.ClassCastException: clojure.lang.PersistentHashMap cannot be cast to java.util.Map$Entry at clojure.lang.APersistentMap.cons(APersistentMap.java:42) at clojure.lang.RT.conj(RT.java:562) at clojure.core$conj.invoke(core.clj:83) at clojure.core$merge$fn__4275.invoke(core.clj:2684) at clojure.core$reduce1.invoke(core.clj:896) at clojure.core$reduce1.invoke(core.clj:887) at clojure.core$merge.doInvoke(core.clj:2684) at clojure.lang.RestFn.invoke(RestFn.java:421) at othello.core$squares_to_flip.invoke(core.clj:186) at othello.core$game_loop.invoke(core.clj:213) at othello.core$_main.doInvoke(core.clj:225) at clojure.lang.RestFn.invoke(RestFn.java:397) at clojure.lang.Var.invoke(Var.java:411) at user$eval5$fn__7.invoke(form-init5981136443637675542.clj:1) at user$eval5.invoke(form-init5981136443637675542.clj:1) at clojure.lang.Compiler.eval(Compiler.java:6619) at clojure.lang.Compiler.eval(Compiler.java:6609) at clojure.lang.Compiler.load(Compiler.java:7064) at clojure.lang.Compiler.loadFile(Compiler.java:7020) at clojure.main$load_script.invoke(main.clj:294) at clojure.main$init_opt.invoke(main.clj:299) at clojure.main$initialize.invoke(main.clj:327) at clojure.main$null_opt.invoke(main.clj:362) at clojure.main$main.doInvoke(main.clj:440) at clojure.lang.RestFn.invoke(RestFn.java:421) at clojure.lang.Var.invoke(Var.java:419) at clojure.lang.AFn.applyToHelper(AFn.java:163) at clojure.lang.Var.applyTo(Var.java:532) at clojure.main.main(main.java:37) -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: contains? and transient set
It is not currently in the list for 1.6. At some point, we have to draw a
line and bear down on some set of tickets - this ticket is currently behind
that line.
We will be more regularly moving patches through the system, getting them
reviewed and included in master, and releasing new versions so that the
wait time between releases is reduced (and the volume of included patches
is increased). Voting for an issue helps raise its visibility and level of
community interest and that is one of the most important things we look at
for triage.
Alex
On Wednesday, December 4, 2013 10:00:20 AM UTC-6, Las wrote:
cool! hope the patch is good for 1.6! :)
2013/12/4 Alex Miller al...@puredanger.com javascript:
Both contains? and get should work with transient sets imo.
This is already in jira: http://dev.clojure.org/jira/browse/CLJ-700.
Alex
On Wednesday, December 4, 2013 5:04:40 AM UTC-6, Burt wrote:
Does contains? and get not work with transient sets?
Examples:
(contains? #{1 2 3} 1)
; = true
(contains? (transient #{1 2 3}) 1)
; = IllegalArgumentException contains? not supported on type:
clojure.lang.PersistentHashSet$TransientHashSet
(get #{1 2 3} 1)
; = 1
(get (transient #{1 2 3}) 1)
; = nil
How can I check whether an element is contained in a transient set?
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Re: ClassCastException on second pass of loop, works fine during the first.
Hrmm, I'll give that a try and see what I come up with. Thanks for the pointer about others, that makes sense. ! On 04/12/2013, at 7:17 PM, Alex Miller a...@puredanger.com wrote: I would expect others to be either nil or a non-empty seq (never empty) but empty? will return true on a nil, so that still works. I would have swapped the cases and used seq as the test. However, without really reading this too closely, I'd guess the real problem is that you want to (apply merge fst others) since others is a seq of maps. On Wednesday, December 4, 2013 10:24:42 AM UTC-6, Sean Chalmers wrote: Greetings ! I'm attempting to implement Othello in Clojure and I've run into a problem when actually running my game loop. On the first run through, everything works as expected, the black player can make their move, the board is updated and everything is awesome. However when the program loops and it is the white players turn, after they have entered their move the program crashes with the stacktrace at the bottom of this message.. I seem to be having a brain fuzz moment because I can't see how much application would complete happily the first time through without error, then when the nearly identical steps are taken for turn two, I seem to have a type error. The code is here: https://github.com/mankyKitty/clojure-othello/blob/master/src/othello/core.clj . I know it's not great, work in progress! :) From what I can tell from the ST the error is from my squares-to-flip function but I'm unable to reproduce the results in the repl, and I've yet to reach the point where I'm adding a print on every second line (though I'm close). I had originally deduced it was the 'merge' call on the times I would have an empty second argument, hence the 'if' in there but that doesn't appear to have helped at all. I assume it's something I've not anticipated or accounted for with respect to my loop, but I'm not quite sure.. Thanks in advance ! --- STACKTRACE --- Exception in thread main java.lang.ClassCastException: clojure.lang.PersistentHashMap cannot be cast to java.util.Map$Entry at clojure.lang.APersistentMap.cons(APersistentMap.java:42) at clojure.lang.RT.conj(RT.java:562) at clojure.core$conj.invoke(core.clj:83) at clojure.core$merge$fn__4275.invoke(core.clj:2684) at clojure.core$reduce1.invoke(core.clj:896) at clojure.core$reduce1.invoke(core.clj:887) at clojure.core$merge.doInvoke(core.clj:2684) at clojure.lang.RestFn.invoke(RestFn.java:421) at othello.core$squares_to_flip.invoke(core.clj:186) at othello.core$game_loop.invoke(core.clj:213) at othello.core$_main.doInvoke(core.clj:225) at clojure.lang.RestFn.invoke(RestFn.java:397) at clojure.lang.Var.invoke(Var.java:411) at user$eval5$fn__7.invoke(form-init5981136443637675542.clj:1) at user$eval5.invoke(form-init5981136443637675542.clj:1) at clojure.lang.Compiler.eval(Compiler.java:6619) at clojure.lang.Compiler.eval(Compiler.java:6609) at clojure.lang.Compiler.load(Compiler.java:7064) at clojure.lang.Compiler.loadFile(Compiler.java:7020) at clojure.main$load_script.invoke(main.clj:294) at clojure.main$init_opt.invoke(main.clj:299) at clojure.main$initialize.invoke(main.clj:327) at clojure.main$null_opt.invoke(main.clj:362) at clojure.main$main.doInvoke(main.clj:440) at clojure.lang.RestFn.invoke(RestFn.java:421) at clojure.lang.Var.invoke(Var.java:419) at clojure.lang.AFn.applyToHelper(AFn.java:163) at clojure.lang.Var.applyTo(Var.java:532) at clojure.main.main(main.java:37) -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to a topic in the Google Groups Clojure group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/clojure/KLHo7zV66Gc/unsubscribe. To unsubscribe from this group and all its topics, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received
Type hints inside generated code
Hello, I've been having a little problem when trying to generate java interop code and avoid reflection warnings. I have to generate a bunch of functions which delegate to java constructors, like this: (defn mk-a [x y z] (A. x y z)) (defn mk-b [x y z] (B. x y z)) The main reason here is to be able to `apply` the functions to lists of arguments, as java constructors cannot be applied (AFAIK, would be great if I'm wrong - would solve a lot of my problems!). The problem is - java constructors are overloaded: A(String x, int y, int z) A(BigDecimal x, String y, int z) ... I was trying to generate such functions in my top-level form, like this: (doseq [[java-ctor fn-name] [['A. 'mk-a] [B'. 'mk-b]] (eval `(defn ~fn-name [x# y# z#] (cond (string? x#) (~java-ctor ^String x# y# z#) (string? y#) (~java-ctor x# ^String y# z# Which still generates reflection warnings as type hints are read by the reader and applied to the forms read by the eval, not the result of the eval itself (please, correct me if I'm wrong here). I have a suspicion that the way I'm approaching the problem is wrong :) How should I go around solving this problem? -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Advice on choosing the right data structure
I would like to implement an algorithm that works on trees (n-ary trees) where each node is a complex type. Aside from the usual tree traversals I will need to be able to access the parent of a node. Performance is important since the algorithm is going to traverse the tree several times and update the nodes. I am wondering if a purely functional approach is better than using side effects. I tried a purely functional approach with zippers but ran into some trouble with the zipper API. I also think I will would have performance problems too as there is a lot of bookkeeping in a zipper (paths, parents associated with a loc). I looked into this nice document https://github.com/Prismatic/eng-practices/blob/master/clojure/20130926-data-representation.md to help me choose the right data structure. When maximum efficiency is important they suggest defrecord, deftype or reify. If I go for an imperative implementation it seems like deftype to represent the tree nodes would work well since it allows for mutable fields. Any advice on choosing the right data structure and whether to use a functional or imperative implementation is appreciated. Thanks. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Type hints inside generated code
Try something like:
(let [x (with-meta (gen-sym) {:tag String}]
(defn foo [~x] ...))
- James
On 4 December 2013 19:55, dm3 deadmo...@gmail.com wrote:
Hello,
I've been having a little problem when trying to generate java interop
code and avoid reflection warnings. I have to generate a bunch of
functions which delegate to java constructors, like this:
(defn mk-a [x y z] (A. x y z))
(defn mk-b [x y z] (B. x y z))
The main reason here is to be able to `apply` the functions to lists of
arguments, as java constructors cannot be applied (AFAIK, would be great if
I'm wrong - would solve a lot of my problems!).
The problem is - java constructors are overloaded:
A(String x, int y, int z)
A(BigDecimal x, String y, int z)
...
I was trying to generate such functions in my top-level form, like this:
(doseq [[java-ctor fn-name] [['A. 'mk-a] [B'. 'mk-b]]
(eval `(defn ~fn-name [x# y# z#]
(cond (string? x#)
(~java-ctor ^String x# y# z#)
(string? y#)
(~java-ctor x# ^String y# z#
Which still generates reflection warnings as type hints are read by the
reader and applied to the forms read by the eval, not the result of the
eval itself (please, correct me if I'm wrong here).
I have a suspicion that the way I'm approaching the problem is wrong :)
How should I go around solving this problem?
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Re: Advice on choosing the right data structure
On 4 December 2013 20:27, dabd dario.reh...@gmail.com wrote: I tried a purely functional approach with zippers but ran into some trouble with the zipper API. I also think I will would have performance problems too as there is a lot of bookkeeping in a zipper (paths, parents associated with a loc). You think you'll have performance problems? Have you benchmarked and checked? :) - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Advice on choosing the right data structure
I didn't get there because I ran into problems with the zipper API. When you call 'children' on a loc you get a seq of nodes instead of a seq of locs which causes me problems in a recursive algorithm operating on locs. On Wednesday, December 4, 2013 8:38:17 PM UTC, James Reeves wrote: On 4 December 2013 20:27, dabd dario@gmail.com javascript: wrote: I tried a purely functional approach with zippers but ran into some trouble with the zipper API. I also think I will would have performance problems too as there is a lot of bookkeeping in a zipper (paths, parents associated with a loc). You think you'll have performance problems? Have you benchmarked and checked? :) - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Advice on choosing the right data structure
it might be worthwhile to implement custom zippers for your trees, without using clojure.zip. I've done this for navigating into json structures and it was relatively painless (admittedly I only needed a smallish subset of the functionality provided by clojure.zip). On Wed, Dec 4, 2013 at 1:09 PM, dabd dario.reh...@gmail.com wrote: I didn't get there because I ran into problems with the zipper API. When you call 'children' on a loc you get a seq of nodes instead of a seq of locs which causes me problems in a recursive algorithm operating on locs. On Wednesday, December 4, 2013 8:38:17 PM UTC, James Reeves wrote: On 4 December 2013 20:27, dabd dario@gmail.com wrote: I tried a purely functional approach with zippers but ran into some trouble with the zipper API. I also think I will would have performance problems too as there is a lot of bookkeeping in a zipper (paths, parents associated with a loc). You think you'll have performance problems? Have you benchmarked and checked? :) - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- Ben Wolfson Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure. [Larousse, Drink entry] -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Advice on choosing the right data structure
I had to implement a custom tree zipper as none of the existing zippers worked for me. My question is are there better alternatives when you want the best performance in clojure? On Wednesday, December 4, 2013 9:12:16 PM UTC, Ben wrote: it might be worthwhile to implement custom zippers for your trees, without using clojure.zip. I've done this for navigating into json structures and it was relatively painless (admittedly I only needed a smallish subset of the functionality provided by clojure.zip). On Wed, Dec 4, 2013 at 1:09 PM, dabd dario@gmail.com javascript:wrote: I didn't get there because I ran into problems with the zipper API. When you call 'children' on a loc you get a seq of nodes instead of a seq of locs which causes me problems in a recursive algorithm operating on locs. On Wednesday, December 4, 2013 8:38:17 PM UTC, James Reeves wrote: On 4 December 2013 20:27, dabd dario@gmail.com wrote: I tried a purely functional approach with zippers but ran into some trouble with the zipper API. I also think I will would have performance problems too as there is a lot of bookkeeping in a zipper (paths, parents associated with a loc). You think you'll have performance problems? Have you benchmarked and checked? :) - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/groups/opt_out. -- Ben Wolfson Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure. [Larousse, Drink entry] -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Advice on choosing the right data structure
oh, I meant custom from the bottom up, without using clojure.zip at all (so your issue with the return value of children wouldn't come up). I realize this doesn't answer your question about alternatives. On Wed, Dec 4, 2013 at 1:15 PM, dabd dario.reh...@gmail.com wrote: I had to implement a custom tree zipper as none of the existing zippers worked for me. My question is are there better alternatives when you want the best performance in clojure? On Wednesday, December 4, 2013 9:12:16 PM UTC, Ben wrote: it might be worthwhile to implement custom zippers for your trees, without using clojure.zip. I've done this for navigating into json structures and it was relatively painless (admittedly I only needed a smallish subset of the functionality provided by clojure.zip). On Wed, Dec 4, 2013 at 1:09 PM, dabd dario@gmail.com wrote: I didn't get there because I ran into problems with the zipper API. When you call 'children' on a loc you get a seq of nodes instead of a seq of locs which causes me problems in a recursive algorithm operating on locs. On Wednesday, December 4, 2013 8:38:17 PM UTC, James Reeves wrote: On 4 December 2013 20:27, dabd dario@gmail.com wrote: I tried a purely functional approach with zippers but ran into some trouble with the zipper API. I also think I will would have performance problems too as there is a lot of bookkeeping in a zipper (paths, parents associated with a loc). You think you'll have performance problems? Have you benchmarked and checked? :) - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- Ben Wolfson Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure. [Larousse, Drink entry] -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- Ben Wolfson Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure. [Larousse, Drink entry] -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Type hints inside generated code
This would work if I knew the type of the function arguments. It doesn't
seem to work when type-hinting on the constructor call.
On Wednesday, 4 December 2013 22:31:53 UTC+2, James Reeves wrote:
Try something like:
(let [x (with-meta (gen-sym) {:tag String}]
(defn foo [~x] ...))
- James
On 4 December 2013 19:55, dm3 dead...@gmail.com javascript: wrote:
Hello,
I've been having a little problem when trying to generate java interop
code and avoid reflection warnings. I have to generate a bunch of
functions which delegate to java constructors, like this:
(defn mk-a [x y z] (A. x y z))
(defn mk-b [x y z] (B. x y z))
The main reason here is to be able to `apply` the functions to lists of
arguments, as java constructors cannot be applied (AFAIK, would be great if
I'm wrong - would solve a lot of my problems!).
The problem is - java constructors are overloaded:
A(String x, int y, int z)
A(BigDecimal x, String y, int z)
...
I was trying to generate such functions in my top-level form, like this:
(doseq [[java-ctor fn-name] [['A. 'mk-a] [B'. 'mk-b]]
(eval `(defn ~fn-name [x# y# z#]
(cond (string? x#)
(~java-ctor ^String x# y# z#)
(string? y#)
(~java-ctor x# ^String y# z#
Which still generates reflection warnings as type hints are read by the
reader and applied to the forms read by the eval, not the result of the
eval itself (please, correct me if I'm wrong here).
I have a suspicion that the way I'm approaching the problem is wrong :)
How should I go around solving this problem?
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Re: Advice on choosing the right data structure
On 4 December 2013 21:09, dabd dario.reh...@gmail.com wrote: I didn't get there because I ran into problems with the zipper API. When you call 'children' on a loc you get a seq of nodes instead of a seq of locs which causes me problems in a recursive algorithm operating on locs. Have you tried using next and end? for a depth-first transversal? - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Advice on choosing the right data structure
Additionally, if you need more complex access patterns you could see if this helps: https://github.com/akhudek/zip-visit For performance, there is a fast-zip library that is api compatible with clojure.zip. You can just swap the clojure.zip namespace for the fast-zip namespace. Note that you'd need to make the same swap in any libraries you use with your zippers (like zip-visit) since fast-zip is not implementation compatible with clojure.zip. More broadly, I've found that straight up recursive algorithms can be a lot faster than zippers, especially for read only operations. Of course the stack size limits what you can do with tree recursion. As others have said, it's best to see if you actually have performance problems first. On Wednesday, December 4, 2013 5:30:02 PM UTC-5, James Reeves wrote: On 4 December 2013 21:09, dabd dario@gmail.com javascript: wrote: I didn't get there because I ran into problems with the zipper API. When you call 'children' on a loc you get a seq of nodes instead of a seq of locs which causes me problems in a recursive algorithm operating on locs. Have you tried using next and end? for a depth-first transversal? - James -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Quick library status updates (logging, Redis, i18n, etc.)
+1 Thanks, Peter! On 4 December 2013 18:12, Baishampayan Ghose b.gh...@gmail.com wrote: Fantastic stuff, Peter. Your projects are extremely useful, well designed and have great docs. Your work is really inspiring. ~BG Sent from phone. Please excuse brevity. On 4 Dec 2013 23:00, Peter Taoussanis ptaoussa...@gmail.com wrote: Hi all, quick batched update on some libs that I'm maintaining: Timbre - v3.0.0-RC2 - 2013-12-04 == Logging profiling tools Major recent changes: * Carmine (Redis) appender that serializes log entries to length-limited, rotating lists by log level. Allows easy querying+manipulation of log as a Clojure value: the log is just a vector of ordered maps. Works great with Datomic's query engine, or regular seq fns (filter, group-by, sort-by, etc.). * Support for ad hoc logging config - no longer reliant on a global config atom (though it's still there for convenience). * Appender rate limiter has been made a lot more flexible, useful by default. https://github.com/ptaoussanis/timbre https://github.com/ptaoussanis/timbre/blob/master/CHANGELOG.md http://ptaoussanis.github.io/timbre/ - API docs Carmine v2.4.0 - 2013-11-18 === Redis client message queue Major recent changes: * Completely rewrote message queue system - numerous big improvements, incl. important reliability improvements. * Completely rewrote reply parsing system for robustness + flexibility. * Brought Tundra out of alpha, added S3 datastore. Allows automatic data replication to a secondary data store, and an option to automatically evict cold keys from memory. Basically provides a convenient way of running Redis against much larger datasets than can fit in memory. * Big improvements to atomic operations API - everything has been unified behind a single interface. * A ton of other small improvements, including bug fixes. https://github.com/ptaoussanis/carmine https://github.com/ptaoussanis/carmine/blob/master/CHANGELOG.md http://ptaoussanis.github.io/carmine/ - API docs Nippy v2.5.1 - 2013-12-04 = Extendable, high-performance, binary serialization Major recent changes: * Continued performance work. Think it's ballpark about as fast as it's going to get. * LZMA2 very-high-compression compressor (ahem). * New Java Serializable fallback support. Basically serializes anything you can throw at it - will select the best available method. Notably Throwables of all types are now covered. https://github.com/ptaoussanis/nippy https://github.com/ptaoussanis/nippy/blob/master/CHANGELOG.md http://ptaoussanis.github.io/nippy/ - API docs Tower v2.0.1 - 2013-11-06 = Internationalisation (i18n) and localisation (L10n) tools Major recent changes: * Stable. https://github.com/ptaoussanis/tower https://github.com/ptaoussanis/tower/blob/master/CHANGELOG.md http://ptaoussanis.github.io/tower/ - API docs Faraday v1.0.1 - 2013-12-04 == Amazon DynamoDB client Major recent changes: * Went 1.0, production-ready. https://github.com/ptaoussanis/faraday https://github.com/ptaoussanis/faraday/blob/master/CHANGELOG.md http://ptaoussanis.github.io/faraday/ - API docs Touchstone v2.0.1 - 2013-11-25 = High performance, rapidly converging A/B testing tool Major recent changes: * Stable. https://github.com/ptaoussanis/touchstone https://github.com/ptaoussanis/touchstone/blob/master/CHANGELOG.md http://ptaoussanis.github.io/touchstone/ - API docs General status Tower still requires Clourescript dictionary support - hope to find some time to look into that in the coming weeks. Carmine's got a bunch of changes coming up to support Redis Cluster Sentinel - though I'm waiting on the specs there to get finalised first. Everything else should (hopefully) stay more or less stable from here (modulo bugs). Carmine's in good shape as of v2.4. Timbre's in good shape as of v3, though the RC will need some time to settle before I'm confident it's good for production. Ahh- yeah, nothing else I can think of. Hit me up if you have any questions/problems/wanna-say-hi/whatever. Cheers! :-) -- Peter Taoussanis ptaoussanis at gmail.com https://twitter.com/ptaoussanis -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit
Re: Advice on choosing the right data structure
Thanks I'll take a look at your libraries.
One problem I found with the zipper API is that if you have a recursive
function that takes a loc, when you call it on the clojure.zip/children of
a given loc it won't work because this function returns a seq of nodes
instead of a seq of locs. Shouldn't we add a function like
children-as-locs to the API for this purpose or is there another way?
(defn children-as-locs
Returns a seq of locs of the children of loc.
[loc]
(when (z/branch? loc)
(let [[node path] loc
cs (z/children loc)]
(map-indexed (fn [i c]
(with-meta [c {:l (vec (take i cs))
:pnodes (if path (conj (:pnodes path)
node) [node])
:ppath path
:r (vec (drop (inc i) cs))}]
(meta loc)))
cs
On Wednesday, December 4, 2013 11:46:29 PM UTC, Alexander Hudek wrote:
Additionally, if you need more complex access patterns you could see if
this helps:
https://github.com/akhudek/zip-visit
For performance, there is a fast-zip library that is api compatible with
clojure.zip. You can just swap the clojure.zip namespace for the fast-zip
namespace. Note that you'd need to make the same swap in any libraries you
use with your zippers (like zip-visit) since fast-zip is not implementation
compatible with clojure.zip.
More broadly, I've found that straight up recursive algorithms can be a
lot faster than zippers, especially for read only operations. Of course the
stack size limits what you can do with tree recursion. As others have said,
it's best to see if you actually have performance problems first.
On Wednesday, December 4, 2013 5:30:02 PM UTC-5, James Reeves wrote:
On 4 December 2013 21:09, dabd dario@gmail.com wrote:
I didn't get there because I ran into problems with the zipper API.
When you call 'children' on a loc you get a seq of nodes instead of a seq
of locs which causes me problems in a recursive algorithm operating on locs.
Have you tried using next and end? for a depth-first transversal?
- James
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Re: Quick library status updates (logging, Redis, i18n, etc.)
Thanks Baishampayan, Karsten - appreciate it! -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Quick library status updates (logging, Redis, i18n, etc.)
Hi Peter, Timbre looks quite cool but just a bit surprised to see it using spit. Surely thats not particularly performant or is there something I'm missing? cheers Colin On Thursday, December 5, 2013 6:30:11 AM UTC+13, Peter Taoussanis wrote: Hi all, quick batched update on some libs that I'm maintaining: *Timbre - v3.0.0-RC2 - 2013-12-04* == Logging profiling tools Major recent changes: * Carmine (Redis) appender that serializes log entries to length-limited, rotating lists by log level. Allows easy querying+manipulation of log as a Clojure value: the log is just a vector of ordered maps. Works great with Datomic's query engine, or regular seq fns (filter, group-by, sort-by, etc.). * Support for ad hoc logging config - no longer reliant on a global config atom (though it's still there for convenience). * Appender rate limiter has been made a lot more flexible, useful by default. https://github.com/ptaoussanis/timbre https://github.com/ptaoussanis/timbre/blob/master/CHANGELOG.md http://ptaoussanis.github.io/timbre/ - API docs *Carmine v2.4.0 - 2013-11-18* === Redis client message queue Major recent changes: * Completely rewrote message queue system - numerous big improvements, incl. important reliability improvements. * Completely rewrote reply parsing system for robustness + flexibility. * Brought Tundra out of alpha, added S3 datastore. Allows automatic data replication to a secondary data store, and an option to automatically evict cold keys from memory. Basically provides a convenient way of running Redis against much larger datasets than can fit in memory. * Big improvements to atomic operations API - everything has been unified behind a single interface. * A ton of other small improvements, including bug fixes. https://github.com/ptaoussanis/carmine https://github.com/ptaoussanis/carmine/blob/master/CHANGELOG.md http://ptaoussanis.github.io/carmine/ - API docs *Nippy v2.5.1 - 2013-12-04* = Extendable, high-performance, binary serialization Major recent changes: * Continued performance work. Think it's ballpark about as fast as it's going to get. * LZMA2 very-high-compression compressor (ahem). * New Java Serializable fallback support. Basically serializes anything you can throw at it - will select the best available method. Notably Throwables of all types are now covered. https://github.com/ptaoussanis/nippy https://github.com/ptaoussanis/nippy/blob/master/CHANGELOG.md http://ptaoussanis.github.io/nippy/ - API docs *Tower v2.0.1 - 2013-11-06* = Internationalisation (i18n) and localisation (L10n) tools Major recent changes: * Stable. https://github.com/ptaoussanis/tower https://github.com/ptaoussanis/tower/blob/master/CHANGELOG.md http://ptaoussanis.github.io/tower/ - API docs *Faraday v1.0.1 - 2013-12-04* == Amazon DynamoDB client Major recent changes: * Went 1.0, production-ready. https://github.com/ptaoussanis/faraday https://github.com/ptaoussanis/faraday/blob/master/CHANGELOG.md http://ptaoussanis.github.io/faraday/ - API docs *Touchstone v2.0.1 - 2013-11-25* = High performance, rapidly converging A/B testing tool Major recent changes: * Stable. https://github.com/ptaoussanis/touchstone https://github.com/ptaoussanis/touchstone/blob/master/CHANGELOG.md http://ptaoussanis.github.io/touchstone/ - API docs *General status* Tower still requires Clourescript dictionary support - hope to find some time to look into that in the coming weeks. Carmine's got a bunch of changes coming up to support Redis Cluster Sentinel - though I'm waiting on the specs there to get finalised first. Everything else should (hopefully) stay more or less stable from here (modulo bugs). Carmine's in good shape as of v2.4. Timbre's in good shape as of v3, though the RC will need some time to settle before I'm confident it's good for production. Ahh- yeah, nothing else I can think of. Hit me up if you have any questions/problems/wanna-say-hi/whatever. Cheers! :-) -- *Peter Taoussanis*ptaoussanis at gmail.com https://twitter.com/ptaoussanis -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Quick library status updates (logging, Redis, i18n, etc.)
Hi Colin, Timbre looks quite cool but just a bit surprised to see it using spit. Surely thats not particularly performant or is there something I'm missing? Spit does alright in a lot of cases (certainly for prototyping, etc.). The example appenders are there mostly to show how appenders are written so the goal was brevity+clarity. In production you'll generally be writing to a db or some other form of distributed storage, so you'll be using your own appender. The Carmine appender is performant out-the-box (~50k+ writes/sec on decent hardware). -- *Peter Taoussanis* -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Type hints inside generated code
Sorry for the confusion, type annotations do work in the evaluated code. I
just didn't supply enough of them.
Although I'm still not sure if they will work in all cases, as per
http://stackoverflow.com/questions/11919602/generating-clojure-code-with-type-hints
.
On Wednesday, 4 December 2013 23:22:36 UTC+2, dm3 wrote:
This would work if I knew the type of the function arguments. It doesn't
seem to work when type-hinting on the constructor call.
On Wednesday, 4 December 2013 22:31:53 UTC+2, James Reeves wrote:
Try something like:
(let [x (with-meta (gen-sym) {:tag String}]
(defn foo [~x] ...))
- James
On 4 December 2013 19:55, dm3 dead...@gmail.com wrote:
Hello,
I've been having a little problem when trying to generate java interop
code and avoid reflection warnings. I have to generate a bunch of
functions which delegate to java constructors, like this:
(defn mk-a [x y z] (A. x y z))
(defn mk-b [x y z] (B. x y z))
The main reason here is to be able to `apply` the functions to lists of
arguments, as java constructors cannot be applied (AFAIK, would be great if
I'm wrong - would solve a lot of my problems!).
The problem is - java constructors are overloaded:
A(String x, int y, int z)
A(BigDecimal x, String y, int z)
...
I was trying to generate such functions in my top-level form, like this:
(doseq [[java-ctor fn-name] [['A. 'mk-a] [B'. 'mk-b]]
(eval `(defn ~fn-name [x# y# z#]
(cond (string? x#)
(~java-ctor ^String x# y# z#)
(string? y#)
(~java-ctor x# ^String y# z#
Which still generates reflection warnings as type hints are read by the
reader and applied to the forms read by the eval, not the result of the
eval itself (please, correct me if I'm wrong here).
I have a suspicion that the way I'm approaching the problem is wrong :)
How should I go around solving this problem?
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