Re: Alternate set literal syntax?
On Sat, Mar 24, 2012 at 1:28 AM, Sean Corfield seancorfi...@gmail.com wrote:
On Fri, Mar 23, 2012 at 8:44 PM, Cedric Greevey cgree...@gmail.com wrote:
#{foo bar baz} is somewhat ugly. It occurs to me that one could modify
the reader to additionally accept
{{foo bar baz}}
My concern is that {{1 2 3 4}5} is currently legal - a map with a map
as a key and 5 as the value. That means that the reader couldn't tell
if {{ introduced your set notation or the start of a nested map
without looking arbitrarily far ahead. And that problem gets worse if
you encounter {{{ or or... {{{ could introduce a nested map, a
map of your sets or one of your sets containing a map...
The other objections are fair enough -- matters of taste. But the
above is a technical problem with a simple fix: make one pass over the
source, converting it into a rudimentary AST whose nodes just look
like (thing thing thing), #(thing thing thing), [thing thing thing],
{thing thing thing}, and #{thing thing thing} (the file as a whole can
be regarded as implicitly wrapped in (do ... )); then (assuming no
unbalanced delimiters) make a second pass doing the rest of the
reader's job. The second pass will see a {...} node with one direct
child that is also a {...} node in, and only in, the case of the
proposed set syntax. (It will also allow { {foo bar baz}} and
similarly as sets.)
As for the aesthetics, what I like about {{...}} is that the
delimiters are symmetrical, unlike #{...}, and it would allow one to
reserve use of the # mark to, mostly, closures, so # would stand out
more as typically indicating a lambda. (The #{...} syntax then remains
comparatively desirable in the specific case that the set literal is
being used as a predicate, as it's both a set and a lambda in that
context.)
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Clojure cheatsheet with tooltips (alpha)
There are still some problems with this, but it is ready for experimental use, at least. Alex, please don't put this on clojure.org -- it ain't ready yet. http://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.html I found and used TipTip for tooltips [1], because it advertises the ability to keep the tooltips within the browser window no matter where the cursor is relative to the window border. I've tweaked a few settings that may cause it to fail to do this properly sometimes, and there are many cases where the tooltip appears so close to the cursor that it flashes on and off quickly. As a workaround, try moving the cursor away from the tooltip, but still hovering over the link if you can. If anyone knows how to correct those problems by tweaking the JavaScript code or CSS settings, please let me know. The tooltips consist of the normal doc strings, with the first line of dashes removed, and truncated to the first 15 lines if it is longer than that (very few are). Most links go to clojuredocs.org, as usual. Give it a test drive and see what you think. Andy [1] http://code.drewwilson.com/entry/tiptip-jquery-plugin -- 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
Re: New(er) Clojure cheatsheet hot off the presses
I agree that title attribute is the way to go. You shouldn't use the alt attribute for tooltips though, as this violates accessibility standards. Alt should either contain a literal description of the image, or be left empty. On Mar 23, 2012 1:11 PM, Cedric Greevey cgree...@gmail.com wrote: On Fri, Mar 23, 2012 at 3:57 PM, Andy Fingerhut andy.finger...@gmail.com wrote: Thanks for the suggestions, folks. Cedric, have you tried your method before? I'm not sure, but I think it was the thing that I tried that led me to add (b) to my list of preference. I like anything that makes the development job easier, but not if it violates that preference. The tooltip could, in principle, extend beyond the browser window, but the link would have to be at the far right edge of the window, the text would have to be long or the pointer would have to be near the right edge of the link, AND the browser window would have to, bizarrely, not be maximized. In particular, if you fear that the tooltip would extend beyond the screen edge so half of it wasn't displayed at all, that won't happen -- at least, not in Firefox. The last time I saw it the cheat sheet's main content occupied a vertical strip with fairly wide margins left and right. Unless you're putting the full text of the Declaration of Independence into one of the tooltips I don't see there being much likelihood of a problem there. Furthermore, eschewing standard tooltips and using JS or something to roll your own would likely render the tooltips inaccessible (or worse, confusing) with screen-reader software for the visually impaired. -- 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 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
Re: why do we need a (require…)?
This is not a good idea, for many reasons, the simplest of which is: it makes loading a side effect of calling a function in a module. Since loading can have arbitrary effects, it shouldn't be implicit. This isn't warranted by the meager benefits it might provide. -- Rich Hickey http://dev.clojure.org/jira/browse/CLJ-461 On Friday, March 23, 2012 4:37:15 PM UTC-7, FrankS wrote: I can see the need for refer and alias, but why can the compiler not infer from the use of a fully qualified name that a namespace (or class) that is not loaded yet, has to be required? Or did I miss anything? -FrankS. -- 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
Re: ClojureScript source maps
The first step would be just to get the compiler to emit an optional source map. That's definitely the first step! After that, there's going to need to be some way to serve those source maps via HTTP upon request from the browser. However, there's a first step to the first step: Getting column data. The reader currently seems to only produce a :line key in the metadata map. Bonus points if we can merge source maps from the ClojureScript compiler and Closure advanced compilation. Could you please clarify? Do you mean for multi-level mapping? See the Multi-level Mapping Notes section in the v3 spec: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?hl=en_USpli=1pli=1 It seems like once they agree upon a header (as opposed to the javascript comment syntax) this would also be useful for providing pre-macro-expansion vs post-macro-expansion source maps. -- 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
Re: SuperDevMode and SourceMaps for ClojureScript debugging
Any suggestions on how to get started on tackling that? Let's join discussions on this... over here: https://groups.google.com/d/topic/clojure/BUW6-1DqSsI/discussion -- 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
Re: [OT] Any other italian Clojure users?
I'm italian living in milan. Setting up a local clojure user group could be very interesting. I would not say I'm still a programmer. I did a lot of lisp/prolog programming in the 80's, c++/objective-c at the beginning of the 90's, and java from the very beginning of the language (1995). After I long trip in the land of nouns, is nice and resting to come back home in the lands of verbs. mimmo On Friday, March 23, 2012 4:56:35 PM UTC+1, Simone Mosciatti wrote: im italian but now im living in USA... I will come back in july... Im from Siena Il giorno giovedì 22 marzo 2012 04:21:02 UTC-5, Marco Dalla Stella ha scritto: Hi, I just want to know if there are any other italian Clojure users in the ml, maybe for open an Italian Clojure User Group and organize some meetings... Thanks, -- Marco Dalla Stella web: http://thediracsea.org twitter: http://twitter.com/kra1iz3c Il giorno giovedì 22 marzo 2012 04:21:02 UTC-5, Marco Dalla Stella ha scritto: Hi, I just want to know if there are any other italian Clojure users in the ml, maybe for open an Italian Clojure User Group and organize some meetings... Thanks, -- Marco Dalla Stella web: http://thediracsea.org twitter: http://twitter.com/kra1iz3c Il giorno giovedì 22 marzo 2012 04:21:02 UTC-5, Marco Dalla Stella ha scritto: Hi, I just want to know if there are any other italian Clojure users in the ml, maybe for open an Italian Clojure User Group and organize some meetings... Thanks, -- Marco Dalla Stella web: http://thediracsea.org twitter: http://twitter.com/kra1iz3c Il giorno giovedì 22 marzo 2012 04:21:02 UTC-5, Marco Dalla Stella ha scritto: Hi, I just want to know if there are any other italian Clojure users in the ml, maybe for open an Italian Clojure User Group and organize some meetings... Thanks, -- Marco Dalla Stella web: http://thediracsea.org twitter: http://twitter.com/kra1iz3c Il giorno giovedì 22 marzo 2012 04:21:02 UTC-5, Marco Dalla Stella ha scritto: Hi, I just want to know if there are any other italian Clojure users in the ml, maybe for open an Italian Clojure User Group and organize some meetings... Thanks, -- Marco Dalla Stella web: http://thediracsea.org twitter: http://twitter.com/kra1iz3c -- 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
Re: Clojure cheatsheet with tooltips (alpha)
The tooltips themselves seem pretty nice, but on smaller windows, they are sometimes placed behind the edges and thus not visible: http://i.imgur.com/YA4gF.png On Saturday, March 24, 2012 11:15:20 AM UTC+1, Andy Fingerhut wrote: There are still some problems with this, but it is ready for experimental use, at least. Alex, please don't put this on clojure.org -- it ain't ready yet. http://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.htmlhttp://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.html I found and used TipTip for tooltips [1], because it advertises the ability to keep the tooltips within the browser window no matter where the cursor is relative to the window border. I've tweaked a few settings that may cause it to fail to do this properly sometimes, and there are many cases where the tooltip appears so close to the cursor that it flashes on and off quickly. As a workaround, try moving the cursor away from the tooltip, but still hovering over the link if you can. If anyone knows how to correct those problems by tweaking the JavaScript code or CSS settings, please let me know. The tooltips consist of the normal doc strings, with the first line of dashes removed, and truncated to the first 15 lines if it is longer than that (very few are). Most links go to clojuredocs.org, as usual. Give it a test drive and see what you think. Andy [1] http://code.drewwilson.com/entry/tiptip-jquery-pluginhttp://code.drewwilson.com/entry/tiptip-jquery-plugin On Saturday, March 24, 2012 11:15:20 AM UTC+1, Andy Fingerhut wrote: There are still some problems with this, but it is ready for experimental use, at least. Alex, please don't put this on clojure.org -- it ain't ready yet. http://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.htmlhttp://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.html I found and used TipTip for tooltips [1], because it advertises the ability to keep the tooltips within the browser window no matter where the cursor is relative to the window border. I've tweaked a few settings that may cause it to fail to do this properly sometimes, and there are many cases where the tooltip appears so close to the cursor that it flashes on and off quickly. As a workaround, try moving the cursor away from the tooltip, but still hovering over the link if you can. If anyone knows how to correct those problems by tweaking the JavaScript code or CSS settings, please let me know. The tooltips consist of the normal doc strings, with the first line of dashes removed, and truncated to the first 15 lines if it is longer than that (very few are). Most links go to clojuredocs.org, as usual. Give it a test drive and see what you think. Andy [1] http://code.drewwilson.com/entry/tiptip-jquery-pluginhttp://code.drewwilson.com/entry/tiptip-jquery-plugin On Saturday, March 24, 2012 11:15:20 AM UTC+1, Andy Fingerhut wrote: There are still some problems with this, but it is ready for experimental use, at least. Alex, please don't put this on clojure.org -- it ain't ready yet. http://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.htmlhttp://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.html I found and used TipTip for tooltips [1], because it advertises the ability to keep the tooltips within the browser window no matter where the cursor is relative to the window border. I've tweaked a few settings that may cause it to fail to do this properly sometimes, and there are many cases where the tooltip appears so close to the cursor that it flashes on and off quickly. As a workaround, try moving the cursor away from the tooltip, but still hovering over the link if you can. If anyone knows how to correct those problems by tweaking the JavaScript code or CSS settings, please let me know. The tooltips consist of the normal doc strings, with the first line of dashes removed, and truncated to the first 15 lines if it is longer than that (very few are). Most links go to clojuredocs.org, as usual. Give it a test drive and see what you think. Andy [1] http://code.drewwilson.com/entry/tiptip-jquery-pluginhttp://code.drewwilson.com/entry/tiptip-jquery-plugin -- 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
Re: Alternate set literal syntax?
I would suggest that we introduced some klingon characters in the language,
we could then satisfy all these alien desires to change a syntax that has been
established 4 years ago.
We have a product driving an hospital here, your esthetic considerations do
not
fit in my deployment plan. This is not a toy language anymore... That era is
behind
us since Jan. 2009.
With nearly 5 versions out since 2009, I think that we can say that the
language has
reached some maturity at least regarding the syntax.
Now we are in the framework selection phase to meet greater challenges and
improving internals and platform availability.
I suggest you clone the source code and create your custom reader version.
Then you will be free to apply any change you may feel appropriate.
vaj HabHa''a' je 'uSDu'lIj joj
Luc
On Sat, Mar 24, 2012 at 1:28 AM, Sean Corfield seancorfi...@gmail.com wrote:
On Fri, Mar 23, 2012 at 8:44 PM, Cedric Greevey cgree...@gmail.com wrote:
#{foo bar baz} is somewhat ugly. It occurs to me that one could modify
the reader to additionally accept
{{foo bar baz}}
My concern is that {{1 2 3 4}5} is currently legal - a map with a map
as a key and 5 as the value. That means that the reader couldn't tell
if {{ introduced your set notation or the start of a nested map
without looking arbitrarily far ahead. And that problem gets worse if
you encounter {{{ or or... {{{ could introduce a nested map, a
map of your sets or one of your sets containing a map...
The other objections are fair enough -- matters of taste. But the
above is a technical problem with a simple fix: make one pass over the
source, converting it into a rudimentary AST whose nodes just look
like (thing thing thing), #(thing thing thing), [thing thing thing],
{thing thing thing}, and #{thing thing thing} (the file as a whole
be regarded as implicitly wrapped in (do ... )); then (assuming no
unbalanced delimiters) make a second pass doing the rest of the
reader's job. The second pass will see a {...} node with one direct
child that is also a {...} node in, and only in, the case of the
proposed set syntax. (It will also allow { {foo bar baz}} and
similarly as sets.)
As for the aesthetics, what I like about {{...}} is that the
delimiters are symmetrical, unlike #{...}, and it would allow one to
reserve use of the # mark to, mostly, closures, so # would stand out
more as typically indicating a lambda. (The #{...} syntax then remains
comparatively desirable in the specific case that the set literal is
being used as a predicate, as it's both a set and a lambda in that
context.)
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Re: 'contains?' on 'sorted-set-by' based on the comparator only? (possible bug?)
Thanks for the explanations! So is there a way to build a set or map that has sorting property independent from the element lookup? On Friday, March 16, 2012 2:03:15 AM UTC+1, Alan Malloy wrote: And this is exactly as it should be. The sorted set has no way to compare items other than by your comparator. If it just arbitrarily decided to use = instead of checking that (zero? (compare x y)) it would not be using your comparator. Note also that the behavior of contains? is consistent with conj and disj: if the item is contained in the set, then conj will keep size the same and disj will decrease it; otherwise conj will increase the size and disj will leave it the same. On Mar 15, 3:39 pm, Stuart Campbell stu...@harto.org wrote: Actually, sorted-map-by does behave the same way, but in your example you tried to lookup a value instead of a key: user (def m (sorted-map-by #( (%1 0) (%2 0)) [1 :a] [2 :b])) #'user/m user (get m [1 :foo]) [2 :b] It looks like PersistentTreeMap.entryAt https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P..https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P...is responsible for this behaviour. Regards, Stuart On 13 March 2012 05:20, mnicky markus.mas...@gmail.com wrote: It seems that when using the sorted set with my own comparator (sorted-set-by), the lookup via 'contains?' function is based only on the part of the items that participate in the ordering: (contains? (sorted-set [1 :a] [2 :b]) [2 :c]) ;= false (contains? (sorted-set-by #( (%1 0) (%2 0)) [1 :a] [2 :b]) [2 :c]) ;= true The documentation of 'sorted-set-by' says that the _whole_ items are keys: (doc sorted-set-by) ; clojure.core/sorted-set-by ; ([comparator keys]) ; Returns a new sorted set with supplied keys, using the supplied comparator. ; nil So according to the documentation of 'contains?', it should do lookup based on the whole items, not just their parts used in the comparator: (doc contains?) ; clojure.core/contains? ; ([coll key]) ; Returns true if key is present in the given collection, otherwise ; returns false. Note that for numerically indexed collections like ; vectors and Java arrays, this tests if the numeric key is within the ; range of indexes. 'contains?' operates constant or logarithmic time; ; it will not perform a linear search for a value. See also 'some'. ; nil It's also worth noting that 'sorted-map-by' doesn't behave in this way: (contains? (sorted-map-by #( (%1 0) (%2 0)) [1 :a] [2 :b]) [2 :c]) ;= false Can this be a bug? If not, what's the reason behind this behavior? -- Mnicky -- 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+unsubscribe@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=enhttp://groups.google.com/group/clojure?hl=en On Friday, March 16, 2012 2:03:15 AM UTC+1, Alan Malloy wrote: And this is exactly as it should be. The sorted set has no way to compare items other than by your comparator. If it just arbitrarily decided to use = instead of checking that (zero? (compare x y)) it would not be using your comparator. Note also that the behavior of contains? is consistent with conj and disj: if the item is contained in the set, then conj will keep size the same and disj will decrease it; otherwise conj will increase the size and disj will leave it the same. On Mar 15, 3:39 pm, Stuart Campbell stu...@harto.org wrote: Actually, sorted-map-by does behave the same way, but in your example you tried to lookup a value instead of a key: user (def m (sorted-map-by #( (%1 0) (%2 0)) [1 :a] [2 :b])) #'user/m user (get m [1 :foo]) [2 :b] It looks like PersistentTreeMap.entryAt https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P..https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P...is responsible for this behaviour. Regards, Stuart On 13 March 2012 05:20, mnicky markus.mas...@gmail.com wrote: It seems that when using the sorted set with my own comparator (sorted-set-by), the lookup via 'contains?' function is based only on the part of the items that participate in the ordering: (contains? (sorted-set [1 :a] [2 :b]) [2 :c]) ;= false (contains? (sorted-set-by #( (%1 0) (%2 0)) [1 :a] [2 :b]) [2 :c]) ;= true The documentation of 'sorted-set-by' says that the _whole_ items are keys:
{ANN}Clojure-Control 0.3.2 is out
Hi,all I am pleased to announce that clojure-control 0.3.2 is out.Clojure-control is a clojure DSL for system admin and deployment with many remote machines via ssh.Please see https://github.com/killme2008/clojure-control Main highlights in 0.3.2: 1.You can include other clusters in defcluster,for example,you have defined cluster named frontend and backend,then you can define a new cluster named all to include all of them: (defcluster :all :includes [:frontend :backend]) 2.Fixed issue 11: control could not run on some jdk version. 3.Adds new commands for lein control plugin,you can start a control server by lein control server,then you don't have to compile control file every time when running task,you can run task by lein control run mycluster task -r,it will connect to control server and run the task on server,returns result to client at last. 4.Improve api document. You can upgrade control by lein plugin install control 0.3.2 and change the dependency version in project.clj. -- 庄晓丹 Email:killme2...@gmail.com xzhu...@avos.com Site: http://fnil.net Twitter: @killme2008 -- 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
Re: 'contains?' on 'sorted-set-by' based on the comparator only? (possible bug?)
There's java.util.LinkedHashSet: http://docs.oracle.com/javase/6/docs/api/java/util/LinkedHashSet.html Its iterator will preserve insertion order, but it will ignore duplicates when inserted. It has a number of disadvantages: * only available on clj-jvm * not a persistent data structure, with all the pain that brings * doesn't permit arbitrary iterator orders, only insertion order It would be an interesting exercise to reimplement Linkedhashset as a persistent data structure, implementing IPersistentSet and Seqable. Phil On Mar 24, 2012 1:29 PM, mnicky markus.mas...@gmail.com wrote: Thanks for the explanations! So is there a way to build a set or map that has sorting property independent from the element lookup? On Friday, March 16, 2012 2:03:15 AM UTC+1, Alan Malloy wrote: And this is exactly as it should be. The sorted set has no way to compare items other than by your comparator. If it just arbitrarily decided to use = instead of checking that (zero? (compare x y)) it would not be using your comparator. Note also that the behavior of contains? is consistent with conj and disj: if the item is contained in the set, then conj will keep size the same and disj will decrease it; otherwise conj will increase the size and disj will leave it the same. On Mar 15, 3:39 pm, Stuart Campbell stu...@harto.org wrote: Actually, sorted-map-by does behave the same way, but in your example you tried to lookup a value instead of a key: user (def m (sorted-map-by #( (%1 0) (%2 0)) [1 :a] [2 :b])) #'user/m user (get m [1 :foo]) [2 :b] It looks like PersistentTreeMap.entryAt https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P..https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P...is responsible for this behaviour. Regards, Stuart On 13 March 2012 05:20, mnicky markus.mas...@gmail.com wrote: It seems that when using the sorted set with my own comparator (sorted-set-by), the lookup via 'contains?' function is based only on the part of the items that participate in the ordering: (contains? (sorted-set [1 :a] [2 :b]) [2 :c]) ;= false (contains? (sorted-set-by #( (%1 0) (%2 0)) [1 :a] [2 :b]) [2 :c]) ;= true The documentation of 'sorted-set-by' says that the _whole_ items are keys: (doc sorted-set-by) ; clojure.core/sorted-set-by ; ([comparator keys]) ; Returns a new sorted set with supplied keys, using the supplied comparator. ; nil So according to the documentation of 'contains?', it should do lookup based on the whole items, not just their parts used in the comparator: (doc contains?) ; clojure.core/contains? ; ([coll key]) ; Returns true if key is present in the given collection, otherwise ; returns false. Note that for numerically indexed collections like ; vectors and Java arrays, this tests if the numeric key is within the ; range of indexes. 'contains?' operates constant or logarithmic time; ; it will not perform a linear search for a value. See also 'some'. ; nil It's also worth noting that 'sorted-map-by' doesn't behave in this way: (contains? (sorted-map-by #( (%1 0) (%2 0)) [1 :a] [2 :b]) [2 :c]) ;= false Can this be a bug? If not, what's the reason behind this behavior? -- Mnicky -- 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+unsubscribe@googlegroups.comclojure%2bunsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=enhttp://groups.google.com/group/clojure?hl=en On Friday, March 16, 2012 2:03:15 AM UTC+1, Alan Malloy wrote: And this is exactly as it should be. The sorted set has no way to compare items other than by your comparator. If it just arbitrarily decided to use = instead of checking that (zero? (compare x y)) it would not be using your comparator. Note also that the behavior of contains? is consistent with conj and disj: if the item is contained in the set, then conj will keep size the same and disj will decrease it; otherwise conj will increase the size and disj will leave it the same. On Mar 15, 3:39 pm, Stuart Campbell stu...@harto.org wrote: Actually, sorted-map-by does behave the same way, but in your example you tried to lookup a value instead of a key: user (def m (sorted-map-by #( (%1 0) (%2 0)) [1 :a] [2 :b])) #'user/m user (get m [1 :foo]) [2 :b] It looks like PersistentTreeMap.entryAt https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P..https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/P...is responsible for this behaviour. Regards, Stuart On 13 March 2012 05:20,
GSOC Idea: Interactive documentation with autodoc
Goal of project: Extend (or fork) autodoc such that it can create and run
interactive documentation for any project.
Example for the take function:
*take*function
Usage: (take n coll)
Returns a lazy sequence of the first n items in coll, or all items if
there are fewer than n.
*Example: *
*textarea (take 10 (range 20))/textarea button Eval!/button*
*Output: *
*[0 1 2 3 4 5 6 7 8 9]*
Added in Clojure version 1.0
And then the user could change the code in the browser, it would be sent
off to the server, and the new user would get the answer back:
*Example: textarea (take 5 (range 20))/textarea button Eval!/button*
*Output: [0 1 2 3 4]*
*
*
To make this work, autodoc would need to be extended in two major ways:
1. When generating the html, autodoc would look for metadata within
each definition. If it found :examples within the data, then it would add
in a number of textarea elements and eval buttons prefilled with the
given examples.
Example definition:
(defn take
Returns a lazy sequence of the first n items in coll, or all items if
there are fewer than n.
{:added 1.0
:static true
:examples ['(take 5 (range 10)),'(take 3 (drop 5 (range 1 11)))]}
[n coll]
(lazy-seq
(when (pos? n)
(when-let [s (seq coll)]
(cons (first s) (take (dec n) (rest s)))
2. Have it ship with a webserver that runs something similar to tryclojure
and has all of the routes set up for the documentation to work
automagically. A very basic use of clojail. An interesting challenge would
be finding a way to get outputs besides text to work (things like charts
for incanter).
Conceptually, this isn't too hard to imagine as a project. The main brunt
of the work would be writing all of the examples for each project. Even
then, there are a ton of examples on clojuredocs.org that are under the EPL
license. Having interactive documentation would be pretty cool though. The
only place I have seen it so far has been in Mathematica, and that was only
after you bought the program. If people are interested in this being made,
I'll be the first to volunteer as a student.
Would people be interested in this as a project for GSOC?
-Zack
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Re: revisiting community funding?
Sean Corfield seancorfi...@gmail.com writes: I can't think of a single large open source project that doesn't require a contributor agreement in place. Don't be silly; there are hundreds of projects larger, older, and more successful than Clojure that don't require such busywork. On the other hand it's pretty clear that your opinion and my opinion are not relevant regarding topics like this; the project is still using Jira for crying out loud. -Phil -- 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
Re: ClojureScript source maps
On Fri, Mar 23, 2012 at 10:51 PM, Brandon Bloom snprbo...@gmail.com wrote: The first step would be just to get the compiler to emit an optional source map. That's definitely the first step! After that, there's going to need to be some way to serve those source maps via HTTP upon request from the browser. However, there's a first step to the first step: Getting column data. The reader currently seems to only produce a :line key in the metadata map. Yep. This would require enhancing the Clojure reader. I don't think that's feasible for 1.4, but probably worth pursuing for 1.5. Even without it, we can still get line level debugging which is better than nothing and write the code to use :column data when available. Could you please clarify? Do you mean for multi-level mapping? Yes. Again this is really just bonus points. Priority 1 is just improving the development experience. See the Multi-level Mapping Notes section in the v3 spec: https://docs.google.com/**document/d/**1U1RGAehQwRypUTovF1KRlpiOFze0b** -_2gc6fAH0KY0k/edit?hl=en_US**pli=1pli=1https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?hl=en_USpli=1pli=1 It seems like once they agree upon a header (as opposed to the javascript comment syntax) this would also be useful for providing pre-macro-expansion vs post-macro-expansion source maps. We could also decide to handle multi-mapping ourselves - that is write the code that can produce a merged source map. David -- 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
Re: Clojure cheatsheet with tooltips (alpha)
Hi Andy On 24 March 2012 11:15, Andy Fingerhut andy.finger...@gmail.com wrote: There are still some problems with this, but it is ready for experimental use, at least. Alex, please don't put this on clojure.org -- it ain't ready yet. http://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.html Give it a test drive and see what you think. Slick! :) I tested the tooltips on chrome, firefox and even on my android. On chrome I find the tooltip boxes too transparent. On firefox the transparency is fine but the tooltip font size is bigger than the font-size used on the page (which IMO could be larger anyway) On the android, well yea no tooltips appear :) so you need to do this back forth clicking as before. Interestingly when you go back then a tooltip is placed behind the screen edges and it's kind of difficult to get rid of it. The same appearance like reported here: The tooltips themselves seem pretty nice, but on smaller windows, they are sometimes placed behind the edges and thus not visible: http://i.imgur.com/YA4gF.png Bost -- 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
Clojure Toolbox
A nice list of tools and libraries I stumbled upon. Enjoy! http://www.clojure-toolbox.com/ -- 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
eval seq of forms in another ns
How to evaluate each form from the vector of forms inside of the different namespace? I want to have a seq of the evaluation results as a result. Smth. like this: (eval-with-ns 'user ['(+ 1 2 3) '(- 5 4) '(defn f [] [])]) = (6 3 #'user/f) I know about with-ns, but don't know how to use it to solve 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
Re: Clojure cheatsheet with tooltips (alpha)
The tooltips work well on my BlackBerry, thanks! -Original Message- From: Rostislav Svoboda rostislav.svob...@gmail.com Sender: clojure@googlegroups.com Date: Sat, 24 Mar 2012 13:18:57 To: clojure@googlegroups.com Reply-To: clojure@googlegroups.com Subject: Re: Clojure cheatsheet with tooltips (alpha) Hi Andy On 24 March 2012 11:15, Andy Fingerhut andy.finger...@gmail.com wrote: There are still some problems with this, but it is ready for experimental use, at least. Alex, please don't put this on clojure.org -- it ain't ready yet. http://homepage.mac.com/jafingerhut/files/cheatsheet-clj-1.3.0-v1.4-tooltips/cheatsheet-full.html Give it a test drive and see what you think. Slick! :) I tested the tooltips on chrome, firefox and even on my android. On chrome I find the tooltip boxes too transparent. On firefox the transparency is fine but the tooltip font size is bigger than the font-size used on the page (which IMO could be larger anyway) On the android, well yea no tooltips appear :) so you need to do this back forth clicking as before. Interestingly when you go back then a tooltip is placed behind the screen edges and it's kind of difficult to get rid of it. The same appearance like reported here: The tooltips themselves seem pretty nice, but on smaller windows, they are sometimes placed behind the edges and thus not visible: http://i.imgur.com/YA4gF.png Bost -- 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 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
Re: Alternate set literal syntax?
Your point is clear and valid but isn't it a bit harsh to write the response in a tone like this? After all we are asking and answering questions here, it's not like something is going to change after one request. BTW it is nice to hear Clojure being reliable enough in people's eyes to be used in such a serious application. On Saturday, March 24, 2012 2:17:57 PM UTC+2, Luc wrote: I would suggest that we introduced some klingon characters in the language, we could then satisfy all these alien desires to change a syntax that has been established 4 years ago. We have a product driving an hospital here, your esthetic considerations do not fit in my deployment plan. This is not a toy language anymore... That era is behind us since Jan. 2009. -- 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
Re: Alternate set literal syntax?
Hey, we all have our rough edges :) I'm 50, there's less life in front of me than behind. Debating about the sex of angels looks to me a bad way of using the not so many hours left in our lives on significant problems before the final exit. It's not the first time requests similar to this one pop out on this mailing list. The problem here is a timing issue, we left this phase of discussions a while ago (looks light years to me). Nobody is forced to use Clojure, if it this not appeals to your esthetic values, no problem, just use something else. You have what you think is a great idea, well, implement it, toy with it and then present your conclusions and hard facts here. This approach will yield at least two benefits: A) it will demonstrate that it's doable and will make limitations clear if any exists B) the effort required will make you realize if you get enough bang for your buck. There's so many existing projects to do out there to keep your entire life busy using Clojure, why spend time (even think time) re-inventing the wheel ? As for the Klingon stuff, I do not have bumps in my forehead or elsewhere :))) Luc Your point is clear and valid but isn't it a bit harsh to write the response in a tone like this? After all we are asking and answering questions here, it's not like something is going to change after one request. BTW it is nice to hear Clojure being reliable enough in people's eyes to be used in such a serious application. On Saturday, March 24, 2012 2:17:57 PM UTC+2, Luc wrote: I would suggest that we introduced some klingon characters in the language, we could then satisfy all these alien desires to change a syntax that has been established 4 years ago. We have a product driving an hospital here, your esthetic considerations do not fit in my deployment plan. This is not a toy language anymore... That era is behind us since Jan. 2009. -- 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 -- Softaddictslprefonta...@softaddicts.ca sent by ibisMail! -- 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
Re: Alternate set literal syntax?
Forgot to add these: http://dev.clojure.org/display/community/Clojure+Success+Stories http://www.quora.com/Whos-using-Clojure-in-production Your point is clear and valid but isn't it a bit harsh to write the response in a tone like this? After all we are asking and answering questions here, it's not like something is going to change after one request. BTW it is nice to hear Clojure being reliable enough in people's eyes to be used in such a serious application. On Saturday, March 24, 2012 2:17:57 PM UTC+2, Luc wrote: I would suggest that we introduced some klingon characters in the language, we could then satisfy all these alien desires to change a syntax that has been established 4 years ago. We have a product driving an hospital here, your esthetic considerations do not fit in my deployment plan. This is not a toy language anymore... That era is behind us since Jan. 2009. -- 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 -- Softaddictslprefonta...@softaddicts.ca sent by ibisMail! -- 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
Re: eval seq of forms in another ns
If I remember rightly I solved this by binding *ns* before the eval, e.g. (binding [*ns* some-namespace] (eval form)) On Saturday, March 24, 2012 5:12:29 PM UTC, Renat Yuldashev wrote: How to evaluate each form from the vector of forms inside of the different namespace? I want to have a seq of the evaluation results as a result. Smth. like this: (eval-with-ns 'user ['(+ 1 2 3) '(- 5 4) '(defn f [] [])]) = (6 3 #'user/f) I know about with-ns, but don't know how to use it to solve 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
Re: ClojureScript source maps
We could also decide to handle multi-mapping ourselves - that is write the code that can produce a merged source map. It seems likely (already done?) for browsers to support the X-SourceMap header and //@ comments for the target use case of CoffeeScript - Javascript - Minified Javascript Also, it seems preferable to let the browser do it, so their debugger can operate at various levels of source translation depending on your needs. So why bother doing it ourselves? For the Rhino environment? -- 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
Re: Alternate set literal syntax?
On Sat, Mar 24, 2012 at 1:44 AM, Cedric Greevey cgree...@gmail.com wrote:
On Sat, Mar 24, 2012 at 1:28 AM, Sean Corfield seancorfi...@gmail.com wrote:
On Fri, Mar 23, 2012 at 8:44 PM, Cedric Greevey cgree...@gmail.com wrote:
#{foo bar baz} is somewhat ugly. It occurs to me that one could modify
the reader to additionally accept
{{foo bar baz}}
My concern is that {{1 2 3 4}5} is currently legal - a map with a map
as a key and 5 as the value. That means that the reader couldn't tell
if {{ introduced your set notation or the start of a nested map
without looking arbitrarily far ahead. And that problem gets worse if
you encounter {{{ or or... {{{ could introduce a nested map, a
map of your sets or one of your sets containing a map...
The other objections are fair enough -- matters of taste. But the
above is a technical problem with a simple fix: make one pass over the
source, converting it into a rudimentary AST whose nodes just look
I think the word reader above applies both to the human and computer
kinds. You've only addressed the problem for the computer. A user
would still have to look at the end of the collection to know if it is
a set or map (or use editor).
As for the aesthetics, what I like about {{...}} is that the
delimiters are symmetrical, unlike #{...}, and it would allow one to
reserve use of the # mark to, mostly, closures, so # would stand out
more as typically indicating a lambda.
Sorry to break it to you, but # is used in many places other than
lambdas, so even if you remove it from #{} you still have foo#, #^foo,
#^{foo bar}, #'foo, #foo, #_foo, #foo{1 2}, #foo[1 2], and others
I've probably forgotten.
One option you have is to use Emacs to replace #{} and #() with
something distinctive looking.
(dolist (mode '(clojure-mode slime-repl-mode))
(eval-after-load mode `(font-lock-add-keywords
',mode
(mapcar
(lambda (pair)
`(,(car pair)
(0 (progn (compose-region (match-beginning 1)
(match-end 1)
,(cadr pair))
nil
`((\\(#\\){ ∈)
(\\(#\\)(ƒ)
((\\(fn\\)[\[[:space:]] λ)
((\\(comp\\)[\[[:space:]] ∘)
((\\(range\\)[\[[:space:]] ℝ)
((\\(apply \+\\)[\[[:space:]] ∑)
((\\(Math/pi\\)[\[[:space:]] π)
((\\(-\\)[\[[:space:]] →)
((\\(partial\\)[\[[:space:]] þ)
((\\(complement\\)[\[[:space:]] ¬)
;; not working
;; (Math/pi[:space:] π)
;; ((\\(apply \+\\)[\[[:space:]] ∑)
)
Cheers,
Scott
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Re: labrepl in eclipse 3.6
I had the same experience, and it was caused by the absence of a schema definition in the pom.xml file that is included with the labrepl files downloaded from git. Assuming you're problem is being caused by what caused mine, you'll see the warning icon (yellow triangle with '!') on your labrepl project in the workspace/project explorer area of Eclipse. If you look in the 'Problems' tab and expand the Warnings entries in the tab view, you'll see a Warning indicating that There is no schema defined for this pom.xml file in the labrepl project. If you right-click on this specific Warning message in the Problems tab, select Quick Fix from the context menu, and hit the 'Finish' button in the dialog which appears (which suggests a single solution of 'Add Schema information to the specified pom.xml file'), Eclipse will add the proper xml schema to the pom.xml file and you'll be able to run labrepl as documented. On Mar 7, 5:02 am, nilesh Shah nilesh.shah...@gmail.com wrote: I am a novice at both java and clojure. I installed the counterclockwise eclipse plugin and the labrepl as perhttp://dev.clojure.org/display/doc/Getting+Started+with+Eclipse+and+C After install one of the steps is to Enable Clojure Support - Right-click the labrepl project in Package Explorer and choose Enable/disable Clojure language support When I do this I get Error while tryiing to toggle clojure language support for project labrepl: Any suggestion as to what this means and how I can proceed to get the lab working ? Thx -- 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
Re: Alternate set literal syntax?
On Sat, Mar 24, 2012 at 6:38 PM, Scott Jaderholm jaderh...@gmail.com wrote:
On Sat, Mar 24, 2012 at 1:44 AM, Cedric Greevey cgree...@gmail.com wrote:
As for the aesthetics, what I like about {{...}} is that the
delimiters are symmetrical, unlike #{...}, and it would allow one to
reserve use of the # mark to, mostly, closures, so # would stand out
more as typically indicating a lambda.
Sorry to break it to you, but # is used in many places other than
lambdas, so even if you remove it from #{} you still have foo#, #^foo,
#^{foo bar}, #'foo, #foo, #_foo, #foo{1 2}, #foo[1 2], and others
I've probably forgotten.
Along those lines, the # character is the dispatch macro [which]
causes the reader to use a reader macro from another table, indexed by
the character following # So, it's a little more than just syntactic
sugar.
http://clojure.org/reader
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What is wrong with ClojureQL?
Since Korma appeared, it seems ClojureQL isn't mentioned anywhere anymore. Are there solid reasons why Korma took all the attention to itself? Are there situations in which ClojureQL would be more recommended than Korma? In case nobody remembers CQL : http://clojureql.org/ -- 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
Re: ClojureScript source maps
On Sun, Jul 24, 2011 at 1:19 PM, John concavel...@gmail.com wrote: Is there any interest in having ClojureScript generate source maps? http://code.google.com/p/closure-compiler/wiki/SourceMaps There are a couple of ways to accomplish this. Lots of interest from me. -- 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
Re: New(er) Clojure cheatsheet hot off the presses
On Fri, Mar 23, 2012 at 4:43 PM, David Martin davidhmar...@gmail.com wrote: I agree that title attribute is the way to go. You shouldn't use the alt attribute for tooltips though, as this violates accessibility standards. Alt should either contain a literal description of the image, or be left empty. Be sure to tell xkcd that. (Why can't it be both?) -- 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
Re: 'contains?' on 'sorted-set-by' based on the comparator only? (possible bug?)
In increasing order of difficulty... Option 1: Extend your comparator to sort first on the key you're actually interested in, then if that key isn't different on the others more-or-less arbitrarily. Option 2: Keep the data unsorted in a hash-set. Sort when you need sorted data, e.g. for user presentation, by using a sort function that outputs a seq. (Inefficient if the sort will then be performed often for a given set.) Option 3: Implement your own sorted set type that handles sort-order collisions by having plain sets as equality buckets, using deftype, gen-class, or Java. Option 4: Convince Rich Hickey that having the built in sorted-set not deal with order collisions (ala Option 3, above) is as silly as if he'd had hash-set not deal with hash collisions. :) -- 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
Re: What is wrong with ClojureQL?
you can find discussion of this in a few places, but here's a decent one: https://news.ycombinator.com/item?id=3420691 Cheers, Chris. On Mar 24, 7:54 pm, Daniel Jomphe danieljom...@gmail.com wrote: Since Korma appeared, it seems ClojureQL isn't mentioned anywhere anymore. Are there solid reasons why Korma took all the attention to itself? Are there situations in which ClojureQL would be more recommended than Korma? In case nobody remembers CQL :http://clojureql.org/ -- 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
Re: Alternate set literal syntax?
On Sat, Mar 24, 2012 at 3:46 PM, Softaddicts lprefonta...@softaddicts.ca wrote: Hey, we all have our rough edges :) I'm 50, there's less life in front of me than behind. Debating about the sex of angels looks to me a bad way of using the not so many hours left in our lives on significant problems before the final exit. If this particular thread's topic does not interest you, and you feel reading, and debating in, it would waste your time, perhaps you should just ignore 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
Re: Alternate set literal syntax?
On Sat, Mar 24, 2012 at 6:38 PM, Scott Jaderholm jaderh...@gmail.com wrote:
Sorry to break it to you, but # is used in many places other than
lambdas, so even if you remove it from #{} you still have foo#, #^foo,
#^{foo bar}, #'foo, #foo, #_foo, #foo{1 2}, #foo[1 2], and others
I've probably forgotten.
I was not talking about the number of things it's used for, but rather
the frequency of the uses in production code; sorry if that wasn't
clear.
My experience is that the highest frequency of #s in production code
is at the starts of lambdas; the next highest is regexes, which as
programs of a sort are also quasi-lambda-like (though not usable
directly as operators). Autogensyms in macros are a distant third and
use the # as a suffix, not a prefix. The other uses of # are less
frequent still. At the bottom of the heap, #_ is only used temporarily
in debugging, for the most part.
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Re: Alternate set literal syntax?
I don't mind the #{} syntax, however I feel that if alternate syntax
were to be introduced (for whatever datatype) it should be the unicode
parenthesis since they 1. Look nice, 2. No addition of extra
characters (I value succinctness), 3. They work in most common
existing structured editing environments- emacs/paredit supports
unicode parens right now, whereas a construct like {{}} would break
down pretty fast. The downside (however minor) is the user has to
remap some key-binding to support it.
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core.logic now runs under ClojureScript
There's a lot of work left to do but I was able to successfully solve the zebra puzzle with core.logic running under JavaScript via V8 in ~170ms. There's tons of performance optimization yet to do, but to give some perspective Peter Norvig's version for CL that compiled Prolog took ~17.4 seconds to do it in the 90s. Clojure on the JVM can solve the problem in about ~2-3ms. I think with some work we can get within an order of magnitude on modern JS engines :) Cheers, David -- 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
Re: 'contains?' on 'sorted-set-by' based on the comparator only? (possible bug?)
On Sat, Mar 24, 2012 at 9:39 PM, Cedric Greevey cgree...@gmail.com wrote:
In increasing order of difficulty...
Option 1:
Extend your comparator to sort first on the key you're actually
interested in, then if that key isn't different on the others
more-or-less arbitrarily.
Or use this:
(defn po-to [po]
(let [m (atom #{})]
(fn [a b]
(or
(po a b)
(and
(not (po b a))
(or
( (hash a) (hash b))
(and
(== (hash a) (hash b))
(not= a b)
(or (contains? @m [a b])
(and
(not (contains? @m [b a]))
(swap! m conj [a b]))
(defn sorted-set-po [po keys]
(apply sorted-set-by (po-to po) keys))
Input: a partial order (may be true for a b, true for b a, or false for both).
Output: a sorted-set that uses a total order built from the partial
order. For things where the po says neither a b nor b a, it will
first compare their hashes. If those don't collide, the order of a and
b is decided that way. If they do, and a and b are not actually equal,
it will arbitrarily pick one to be less than the other and remember
its decision so that the ordering of unequal, hash-colliding items
will remain consistent.
Notes:
1. The memory use can grow over time due to the memoization-like
behavior using the atom. However, this only occurs for items with both
order and hash collisions, which should be extraordinarily infrequent.
(If hashes were uniform on [0,2^32-1] you'd need an average of around
65,000 items before, per the birthday paradox, a single collision was
likely within your collection. And then it would probably be for a
pair of items that po considered unequal.) So the memory use growth
should be small (for collections of thousands to millions of items) to
nonexistent (for smaller ones).
2. Two sorted-set-pos with the same items, where they were added in
different sequences, may not sort them in the same order, though this
should be rare (again tied to the frequency of order+hash collisions).
But this is not really a problem since, if you're sorting with a
partial order, it makes sense to consider the ordering within equality
buckets of the partial order to be undefined (the way ordering of an
entire hash-set is undefined) and thus does not make sense to make
program semantics depend on the ordering. Also, all sets compare equal
purely by having the same contents (I checked APersistentSet.java to
be sure) so the two sorted-set-pos would still compare equal despite
traversing their elements in slightly different sequences.
Here's a clooj REPL session testing po-to. Note that the last tests
intentionally induce an order+hash collision of unequal items and
check that the same instance of a po-to produces consistent results
when given the colliding items in either order (that is, it always
returns logical true when given the items in one order and always
returns logical false when given them in the opposite order). The very
last tests verify that it always returns false for equal items.
user=
(def foo (po-to #( (:a %1) (:a %2
#'user/foo
user=
(foo {:a 1 :b 1} {:a 2 :b 1})
true
user=
(foo {:a 1 :b 1} {:a 2 :b 1})
true
user=
(foo {:a 1 :b 1} {:a 2 :b 1})
true
user=
(foo {:a 2 :b 1} {:a 1 :b 1})
false
user=
(foo {:a 2 :b 1} {:a 1 :b 1})
false
user=
(foo {:a 1 :b 1} {:a 1 :b 2})
true
user=
(foo {:a 1 :b 1} {:a 1 :b 2})
true
user=
(foo {:a 1 :b 1} {:a 1 :b 2})
true
user=
(foo {:a 1 :b 2} {:a 1 :b 1})
false
user=
(foo {:a 1 :b 2} {:a 1 :b 1})
false
user=
(foo {:a 1 :b 2} {:a 1 :b 1})
false
user=
(hash {:a 1 :b 1 :c 1})
-1253235521
user=
(hash {:a 1 :b 1 :c 2})
-1253235522
user=
(hash {:a 1 :b 2 :c 1})
-1253235520
user=
(hash {:a 1 :b 0 :c 1})
-1253235522
user=
(foo {:a 1 :b 1 :c 2} {:a 1 :b 0 :c 1})
#{[{:a 1, :c 2, :b 1} {:a 1, :c 1, :b 0}]}
user=
(foo {:a 1 :b 1 :c 2} {:a 1 :b 0 :c 1})
true
user=
(foo {:a 1 :b 1 :c 2} {:a 1 :b 0 :c 1})
true
user=
(foo {:a 1 :b 0 :c 1} {:a 1 :b 1 :c 2})
false
user=
(foo {:a 1 :b 0 :c 1} {:a 1 :b 1 :c 2})
false
user=
(foo {:a 1 :b 0 :c 1} {:a 1 :b 1 :c 2})
false
user=
(def bar (po-to #( (:a %1) (:a %2
#'user/bar
user=
(bar {:a 1 :b 0 :c 1} {:a 1 :b 1 :c 2})
#{[{:a 1, :c 1, :b 0} {:a 1, :c 2, :b 1}]}
user=
(bar {:a 1 :b 0 :c 1} {:a 1 :b 1 :c 2})
true
user=
(bar {:a 1 :b 1 :c 2} {:a 1 :b 0 :c 1})
false
user=
(bar {:a 1 :b 1 :c 2} {:a 1 :b 0 :c 1})
false
user=
(bar {:a 1 :b 1 :c 2} {:a 1 :b 1 :c 2})
false
user=
(bar {:a 1 :b 1 :c 2} {:a 1 :b 1 :c 2})
false
user=
(bar {:a 1 :b 0 :c 1} {:a 1 :b 0 :c 1})
false
user=
(bar {:a 1 :b 0 :c 1} {:a 1 :b 0 :c 1})
false
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For more
Re: Clojure Toolbox
Another link http://cnlojure.org/open.html 2012/3/24 Rostislav Svoboda rostislav.svob...@gmail.com A nice list of tools and libraries I stumbled upon. Enjoy! http://www.clojure-toolbox.com/ -- 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 -- 庄晓丹 Email:killme2...@gmail.com xzhu...@avos.com Site: http://fnil.net Twitter: @killme2008 -- 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
