Aw: Re: Where to place Arguments
Hi, another one which caught me recently is nthnext. I expected (nthnext 5 some-seq), but Clojure complained about 5 being not a sequence. :] Sincerely Meikel -- 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
Aw: Re: help--reading keyboard input from Clojure is surprisingly difficult
Hi, indeed. On the other hand the atom has the advantage of making the loop easily interuptible from the outside. YMMV. :) Sincerely Meikel -- 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: Wisdom sought for functional iterative processing
On Jun 15, 12:41 pm, Christian Schuhegger wrote: > Ah, sorry, perhaps I misunderstand you, but if you use multimethods > (defmulti) in Clojure you do not need to "attach" methods to anything. > The defmulti will allow you "dispatch-on-type" based on the key which > is present in the map (e.g. if :delete is present or if :insert is > present). > > The nice thing about multimethods the lisp style is that they are > additive, e.g. you do not have to change anything in your op > structure. A very good point. I think it would be overkill here, but you're absolutely right that multimethods would be an elegant way to do it if I went that route. Another aspect I need to get used to considering, moving from OO :/ -- 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: No any? function
Could someone add this as a Jira ticket or similar to be reviewed?
Ambrose
On Wed, Jun 15, 2011 at 2:43 AM, Ambrose Bonnaire-Sergeant <
abonnaireserge...@gmail.com> wrote:
> Inspired by "seq"/"empty?" docstrings.
>
> not-any?
>
> Returns false if (pred x) is logical true for any x in coll,
> else true - same as (not (some pred coll)).
>
>
> some
>
> Returns the first logical true value of (pred x) for any x in coll,
> else nil. One common idiom is to use a set as pred, for example
> this will return :fred if :fred is in the sequence, otherwise nil:
> (some #{:fred} coll)
> Please use the idiom (not-any? pred coll) rather than (not (some pred
> coll))
>
> Thoughts?
>
> Ambrose
>
> On Wed, Jun 15, 2011 at 2:31 AM, Kevin Baribeau
> wrote:
>
>> I actually had the same thought as the OP when reading through docs not
>> too long ago.
>>
>> +1 for adding a pointer to "some" in the docstring of "not-any?"
>>
>> -kb
>>
>> On Tue, Jun 14, 2011 at 11:29 AM, Ambrose Bonnaire-Sergeant <
>> abonnaireserge...@gmail.com> wrote:
>>
>>> Hi David,
>>>
>>> any? would be redundant and less general than some, if I am not mistaken.
>>> Compare the docstrings for the hypothetical "any?".
>>>
>>> (some p coll)
>>> Returns the *first logical true value* of (pred x) for any x in coll,
>>> else *nil*.
>>>
>>> (any? p coll)
>>> Returns *true* if (pred x) is logical true for any x in coll,
>>> else *false*.
>>>
>>>
>>> Since *nil* and *false* are both falsy, "some" can be used as a
>>> predicate that is truthy
>>> when it finds truthy result, otherwise falsy. This is exactly the
>>> behavior expected from
>>> an any? function.
>>>
>>> "some" is a poster boy for Clojure's well thought out truthyness system,
>>> this is a great example
>>> of the types of general functions it allows.
>>>
>>> Perhaps a pointer to "some" should be added in the docstring of
>>> "not-any?". Although
>>> a quick look at the source makes it crystal clear. I wasn't aware of
>>> "not-any?"s existence,
>>> maybe noting it in "some"s docstring could be beneficial also.
>>>
>>> Thanks,
>>> Ambrose
>>>
>>> On Tue, Jun 14, 2011 at 3:08 PM, de1976 wrote:
>>>
Hello everyone. In looking through the API documentation, I've noticed
that there is a "not-any?" function available, but there is no
corresponding inverse "any?" function that I can find. There are,
however, "every?" and "not-every?" functions available. The closest I
could find was "some", but wouldn't it make sense to have an "any?"
function for more obvious consistency? Thanks.
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>>>
>>>
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>>
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>
>
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Re: No any? function
On Wed, Jun 15, 2011 at 9:14 AM, CuppoJava wrote: > There is one use of any? over some which hasn't been mentioned: > checking whether a list contains a nil. > > ie. (when (any? nil? xs) (do stuff)) > vs. (when (some nil? xs) (do stuff)) > > Actually, this case works with `some`. user=> (def any? (comp not not some)) #'user/any? user=> (any? nil? [1 nil 2]) true user=> (any? nil? [1 2]) false user=> (some nil? [1 nil 2]) true user=> (some nil? [1 2]) nil Comparing the general semantics, I can see no (useful) distinction between the two in `any?`s favor. `some` returns nil (falsy) on "failure" else truthy `any?` returns false (falsy) on "failure" else true (truthy) .. defining "failure" as all (pred x) in coll being falsy. Thanks, Ambrose -Patrick > > On Jun 14, 9:00 pm, Ken Wesson wrote: > > On Tue, Jun 14, 2011 at 12:29 PM, Ambrose Bonnaire-Sergeant > > > > wrote: > > > "some" is a poster boy for Clojure's well thought out truthyness > system, > > > this is a great example of the types of general functions it allows. > > > > Notably, with a map as first argument it returns the first (truthy) > > mapped value for any of the keys in a coll: > > > > (if-let [f (some fn-map [:super-override :override :normal])] > > (f args)) > > > > -- > > Protege: What is this seething mass of parentheses?! > > Master: Your father's Lisp REPL. This is the language of a true > > hacker. Not as clumsy or random as C++; a language for a more > > civilized age. > > -- > 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: help--reading keyboard input from Clojure is surprisingly difficult
Hi Meikel, it surprised me that you used an atom to run the event loop. A simple loop/recur also works, at least in clojure 1.2.1: (loop [] (let [input (read-line)] (when (pos? (count input)) (println (pick phrases)) (recur Just for the record. Best, Albert -- http://albert.rierol.net http://www.ini.uzh.ch/~acardona/ -- 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: Wisdom sought for functional iterative processing
Ah, sorry, perhaps I misunderstand you, but if you use multimethods
(defmulti) in Clojure you do not need to "attach" methods to anything.
The defmulti will allow you "dispatch-on-type" based on the key which
is present in the map (e.g. if :delete is present or if :insert is
present).
The nice thing about multimethods the lisp style is that they are
additive, e.g. you do not have to change anything in your op
structure.
On Jun 15, 4:38 am, Matthew Phillips wrote:
> On Jun 14, 12:05 pm, gaz jones wrote:
>
> > if i was writing the java i would probably do a "tell dont ask"
> > refactoring so that the operations had an applyTo method:
>
> > List items = initialItems ();
>
> > for (Op op : operations)
> > {
> > op.applyTo(items);
>
> > }
>
> > not sure what your op data structure is, but i would image you could
> > translate that to the clojure code also -- is that reasonable?
>
> I think you're right that the above is a better OO design, but that
> was really just a Java translation of the sort of think I'd like to do
> in Clojure (minus the mutable list).
>
> The ops in this case have abstract meaning (they are [source target
> delta] tuples describing list transformations), and attaching
> "methods" to them (presumably as fn's) in this case would be weird I
> think, as well as requiring a switch from tuples to maps or records.
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Re: Wisdom sought for functional iterative processing
On Jun 15, 11:51 am, Mark Engelberg wrote: > On Tue, Jun 14, 2011 at 7:41 PM, Matthew Phillips wrote: > > Yes. I agree that can work, and that's what I've done in some other > > situations, but it has the downside of lots of "recur" points > > sprinkled around the loop body, which I think makes it almost as hard > > to reason about as having lots of "return" statements in a Java > > method. For small problems like this it's just as good/bad as my > > solution, but what I'm really looking for is a good general idiom to > > use whenever this sort of thing comes up. > > To summarize what others have already pointed out, the main problem > with your approach is that you're trying to do to much in the loop. > It's convertible to Clojure, but clunky to read. The key to making > this readable is to focus on writing a separate function of the form: > > processOp: items op -> items > > If you have such a function, the loop is trivial (or use reduce as in > your original post). Wouldn't such a processOp be the same as the anonymous fn in my reduce- based example? I'm really asking how to write that fn better or, more generally, what is a good idiom for threading conditional transformations. I think I'll pursue the -> (or ->>) based approach and see where it leads, because it seems to fit best with my mental model of pipelining data transforms. And it's entirely possible that I'm over-thinking this, but I treat it as part of learning how to use this tool in its most effective way, rather than just mentally translating Java into Clojure ;) -- 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: Wisdom sought for functional iterative processing
On Tue, Jun 14, 2011 at 7:41 PM, Matthew Phillips wrote: > Yes. I agree that can work, and that's what I've done in some other > situations, but it has the downside of lots of "recur" points > sprinkled around the loop body, which I think makes it almost as hard > to reason about as having lots of "return" statements in a Java > method. For small problems like this it's just as good/bad as my > solution, but what I'm really looking for is a good general idiom to > use whenever this sort of thing comes up. To summarize what others have already pointed out, the main problem with your approach is that you're trying to do to much in the loop. It's convertible to Clojure, but clunky to read. The key to making this readable is to focus on writing a separate function of the form: processOp: items op -> items If you have such a function, the loop is trivial (or use reduce as in your original post). It's hard to know the cleanest way to write such a function without knowing the details of your problem, but that's really the key. -- 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: Wisdom sought for functional iterative processing
On Jun 14, 4:40 pm, Alex Osborne wrote: > Matthew Phillips writes: > > The only way I can think of to write it in Clojure is: > > > (reduce > > (fn [items op] > > (let [items1 (if (:delete op) (drop-index (:delete op) items) > > items)] > > (if (:insert op) (cons (:insert op) items1) items1))) > > items ops) > > > i.e. I'm using a cascade of conditional let's. This isn't _too_ bad in > > this case, but you can image how unreadable this could get. > > To avoid a "cascade of lets" I've occasionally defined a function called > conj-if (or disj-if or assoc-if...). Like so: > > (defn conj-if [coll test x] > (if test (conj coll x) coll)) > > (fn [items op] > (-> (conj-if (foo? op) "one") > (conj-if (bar? op) "two"))) > (conj-if (baz? op) "three"))) > Yes, I have thought about using -> to chain transformations together, in fact it's a little like what I imagine the ST monad (or is it the State monad?) does by chaining a series of apparent-variable- assignments together. I like this idea, but something about writing "xxx-if" functions doesn't seem right, perhaps due to the number of xxx's there might be. Perhaps I need a "do-if" fn that takes a target, predicate and a transform fn, and applies the transform when pred is true. Will have a think about that. > On the other hand the cascading lets are really not that bad especially > if you pull any complex predicate or value-manipulation logic out into > separate functions: > > (fn [items op] > (let [items (if (foo? op) (assoc items "foo" 1) items) > items (if (bar? op) (dissoc items "bar") items) > items (if (baz? op) (empty items) items)] > items)) Interesting, it hadn't occurred to me that I could just keep shadowing "items" in the same let. Usually I think shadowing is a bad idea, but perhaps it's better than "items1", "items2", etc. 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
Re: Wisdom sought for functional iterative processing
On Jun 14, 12:30 pm, Mark Engelberg wrote:
> On Mon, Jun 13, 2011 at 7:37 PM, Matthew Phillips wrote:
> > List items = initialItems ();
>
> > for (Op op : operations)
> > {
> > if (op.requiresDelete ())
> > items.remove (op.indexToDelete ());
>
> > if (op.requiresAdd ())
> > items.add (op.indexToAdd (), op.newItem ());
> > }
>
> One way to transform this is loop-recur.
> (loop [items initialitems, ops (seq operations)]
> (if-not ops items
> (let [op (first ops)]
> ;; Now you can write the logic pretty much the way you did in java
> (cond
> (.requiresDelete op) (recur (.remove items (.op
> indexToDelete)) (next ops))
> (.requiresAdd op) (recur (.add items (.op indexToAdd)
> (.op newItem)) (next ops)
Yes. I agree that can work, and that's what I've done in some other
situations, but it has the downside of lots of "recur" points
sprinkled around the loop body, which I think makes it almost as hard
to reason about as having lots of "return" statements in a Java
method. For small problems like this it's just as good/bad as my
solution, but what I'm really looking for is a good general idiom to
use whenever this sort of thing comes up.
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Re: Wisdom sought for functional iterative processing
On Jun 14, 12:05 pm, gaz jones wrote:
> if i was writing the java i would probably do a "tell dont ask"
> refactoring so that the operations had an applyTo method:
>
> List items = initialItems ();
>
> for (Op op : operations)
> {
> op.applyTo(items);
>
> }
>
> not sure what your op data structure is, but i would image you could
> translate that to the clojure code also -- is that reasonable?
I think you're right that the above is a better OO design, but that
was really just a Java translation of the sort of think I'd like to do
in Clojure (minus the mutable list).
The ops in this case have abstract meaning (they are [source target
delta] tuples describing list transformations), and attaching
"methods" to them (presumably as fn's) in this case would be weird I
think, as well as requiring a switch from tuples to maps or records.
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Re: Using clojure-csv
I think the basic problem is Clojure is not able to find the clojure-csv jar file. I'm afraid I'm not quite clear enough on your specific setup to know exactly what has gone wrong. I'm not sure where you have this jar, or what exactly the shell scripting stuff is in that command you're using to launch it... Can you double-check to make sure that clojure-csv is on the classpath? - David On Tue, Jun 14, 2011 at 2:26 PM, octopusgrabbus wrote: > I am trying to use clojure-csv, but am having a lot of cockpit error. > > Here is my current configuration: > Running Clojure 1.2.1. > Modified a shell script installed by Synaptic to include clojure- > contrib.jar: > > exec java -cp /usr/share/java/clojure.jar:/usr/share/java/clojure- > contrib.jar"$extra_classpath" clojure.main "$@" > > clojure.jar and clojure-contrib.jar are links > lrwxrwxrwx 1 root root 25 2011-06-09 18:38 /usr/share/java/ > clojure-contrib.jar -> clojure-contrib-1.2.0.jar > lrwxrwxrwx 1 root root 17 2011-06-09 18:23 /usr/share/java/ > clojure.jar -> clojure-1.2.1.jar > c > > This fails: > > (ns test-csv > (:import (java.io BufferedReader))) > (use clojure-csv.core) > > with java.lang.ClassNotFoundException: clojure-csv.core > (NO_SOURCE_FILE:6) > > What am I doing wrong? > > Thanks. > cmn > > -- > 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: Early Registration has opened for Clojure Conj 2011!
On Tue, Jun 14, 2011 at 5:00 PM, Sean Corfield wrote: > On Tue, Jun 14, 2011 at 10:29 AM, Chris Redinger wrote: >> http://clojure-conj.org >> Ticket, venue and initial speaker information has been posted. Sign up >> today! > > Already bought my ticket :) > > The link to the hotel reservation system doesn't seem to be working at > the moment tho'... This appeared to be a browser issue (with RockMelt). -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880) -- 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: No any? function
There is one use of any? over some which hasn't been mentioned: checking whether a list contains a nil. ie. (when (any? nil? xs) (do stuff)) vs. (when (some nil? xs) (do stuff)) -Patrick On Jun 14, 9:00 pm, Ken Wesson wrote: > On Tue, Jun 14, 2011 at 12:29 PM, Ambrose Bonnaire-Sergeant > > wrote: > > "some" is a poster boy for Clojure's well thought out truthyness system, > > this is a great example of the types of general functions it allows. > > Notably, with a map as first argument it returns the first (truthy) > mapped value for any of the keys in a coll: > > (if-let [f (some fn-map [:super-override :override :normal])] > (f args)) > > -- > Protege: What is this seething mass of parentheses?! > Master: Your father's Lisp REPL. This is the language of a true > hacker. Not as clumsy or random as C++; a language for a more > civilized age. -- 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: No any? function
On Tue, Jun 14, 2011 at 12:29 PM, Ambrose Bonnaire-Sergeant wrote: > "some" is a poster boy for Clojure's well thought out truthyness system, > this is a great example of the types of general functions it allows. Notably, with a map as first argument it returns the first (truthy) mapped value for any of the keys in a coll: (if-let [f (some fn-map [:super-override :override :normal])] (f args)) -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Where to place Arguments
On Tue, Jun 14, 2011 at 8:12 PM, Sean Corfield wrote: > On Tue, Jun 14, 2011 at 1:28 PM, Nick Zbinden wrote: >> Stu said: >> Objects should be the first parameter to a function (like it would be >> in traditional OO). >> Collections sould be in the last place in th parameter list. >> >> This is because it makes the use of the threading operater easy -> for >> Objects ->> for Collections really easy and can make code much better >> to read. > > Timely. This came up in another thread recently and it was pointed out > that several core functions have the collection argument first: nth, > assoc, contains?, get-in, assoc-in, update-in ... > > Given the stated preference for collections appearing as the last > argument, is there some particular reason why these functions are > exceptions? Or is it just a legacy accident before the "standard" of > collection-last was established? Most of those are map rather than sequence ops. The one that stands out as awkward is nth. (nth 3 [1 2 3 4 5]) should probably be the way it goes. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Using clojure-csv
On Tue, Jun 14, 2011 at 3:26 PM, octopusgrabbus wrote: > This fails: > > (ns test-csv > (:import (java.io BufferedReader))) > (use clojure-csv.core) > > with java.lang.ClassNotFoundException: clojure-csv.core > (NO_SOURCE_FILE:6) > > What am I doing wrong? One thing that stands out is that it should be (:use ...) and not (use ) in an (ns ...) form. But I wouldn't expect that to cause a ClassNotFoundException. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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: Where to place Arguments
On Tue, Jun 14, 2011 at 1:28 PM, Nick Zbinden wrote: > Stu said: > Objects should be the first parameter to a function (like it would be > in traditional OO). > Collections sould be in the last place in th parameter list. > > This is because it makes the use of the threading operater easy -> for > Objects ->> for Collections really easy and can make code much better > to read. Timely. This came up in another thread recently and it was pointed out that several core functions have the collection argument first: nth, assoc, contains?, get-in, assoc-in, update-in ... Given the stated preference for collections appearing as the last argument, is there some particular reason why these functions are exceptions? Or is it just a legacy accident before the "standard" of collection-last was established? -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880) -- 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: Early Registration has opened for Clojure Conj 2011!
On Tue, Jun 14, 2011 at 10:29 AM, Chris Redinger wrote: > http://clojure-conj.org > Ticket, venue and initial speaker information has been posted. Sign up > today! Already bought my ticket :) The link to the hotel reservation system doesn't seem to be working at the moment tho'... -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880) -- 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: Using clojure-csv
In regards to the extra_classpath question, this is what Synaptic installed in /usr/bin/clojure #!/bin/sh if [ "x$CLASSPATH" = "x" ] ; then extra_classpath="" else extra_classpath=":$CLASSPATH" fi while true ; do case "$1" in -cp | -classpath) extra_classpath=":$2" shift 2 ;; --) shift break ;; *) break ;; esac done exec java -cp /usr/share/java/clojure.jar"$extra_classpath" clojure.main "$@" #exec java -cp /usr/share/java/clojure.jar:/usr/share/java/clojure- contrib.jar"$extra_classpath" clojure.main "$@" On Jun 14, 4:04 pm, Chas Emerick wrote: > clojure-csv is not a part of clojure-contrib. What is at $extra_classpath? > For this to work, it would need to include the jar for clojure-csv. > > - Chas > > P.S. Mostly off-topic: the sooner you can get away from whatever re-packaging > your distro has put together for Clojure, the better off you'll be. Linux > package managers are generally not kind with Java (or python or ruby, etc) > libraries, at least in my experience. > > On Jun 14, 2011, at 3:26 PM, octopusgrabbus wrote: > > > > > > > > > I am trying to use clojure-csv, but am having a lot of cockpit error. > > > Here is my current configuration: > > Running Clojure 1.2.1. > > Modified a shell script installed by Synaptic to include clojure- > > contrib.jar: > > > exec java -cp /usr/share/java/clojure.jar:/usr/share/java/clojure- > > contrib.jar"$extra_classpath" clojure.main "$@" > > > clojure.jar and clojure-contrib.jar are links > > lrwxrwxrwx 1 root root 25 2011-06-09 18:38 /usr/share/java/ > > clojure-contrib.jar -> clojure-contrib-1.2.0.jar > > lrwxrwxrwx 1 root root 17 2011-06-09 18:23 /usr/share/java/ > > clojure.jar -> clojure-1.2.1.jar > > c > > > This fails: > > > (ns test-csv > > (:import (java.io BufferedReader))) > > (use clojure-csv.core) > > > with java.lang.ClassNotFoundException: clojure-csv.core > > (NO_SOURCE_FILE:6) > > > What am I doing wrong? > > > Thanks. > > cmn > > > -- > > 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: Using clojure-csv
Thanks. You've answered my question. I've got to set up a real projects directory and build the jar file. I appreciate everyone's patience during this "cockpit error" phase of my learning Clojure. On Jun 14, 4:04 pm, Chas Emerick wrote: > clojure-csv is not a part of clojure-contrib. What is at $extra_classpath? > For this to work, it would need to include the jar for clojure-csv. > > - Chas > > P.S. Mostly off-topic: the sooner you can get away from whatever re-packaging > your distro has put together for Clojure, the better off you'll be. Linux > package managers are generally not kind with Java (or python or ruby, etc) > libraries, at least in my experience. > > On Jun 14, 2011, at 3:26 PM, octopusgrabbus wrote: > > > > > > > > > I am trying to use clojure-csv, but am having a lot of cockpit error. > > > Here is my current configuration: > > Running Clojure 1.2.1. > > Modified a shell script installed by Synaptic to include clojure- > > contrib.jar: > > > exec java -cp /usr/share/java/clojure.jar:/usr/share/java/clojure- > > contrib.jar"$extra_classpath" clojure.main "$@" > > > clojure.jar and clojure-contrib.jar are links > > lrwxrwxrwx 1 root root 25 2011-06-09 18:38 /usr/share/java/ > > clojure-contrib.jar -> clojure-contrib-1.2.0.jar > > lrwxrwxrwx 1 root root 17 2011-06-09 18:23 /usr/share/java/ > > clojure.jar -> clojure-1.2.1.jar > > c > > > This fails: > > > (ns test-csv > > (:import (java.io BufferedReader))) > > (use clojure-csv.core) > > > with java.lang.ClassNotFoundException: clojure-csv.core > > (NO_SOURCE_FILE:6) > > > What am I doing wrong? > > > Thanks. > > cmn > > > -- > > 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: Early Registration has opened for Clojure Conj 2011!
Awesome! Looking forward to 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
Where to place Arguments
Hallo all, I just watched the talk Radical Simplicity (bit.ly/lsub9h) by Stuart Halloway. Very Intressting but one little thing he says I wanted to threw in the groupe because its kind of a half know thing and it should really move into the Clojure Coding Standard. Stu said: Objects should be the first parameter to a function (like it would be in traditional OO). Collections sould be in the last place in th parameter list. This is because it makes the use of the threading operater easy -> for Objects ->> for Collections really easy and can make code much better to read. I'm writing this here because of two reasons: 1. The universial threading operator keeps showing up. Im not saying its a always a bad thing but I think we should trie to avoid it in most cases and the standard on the parameter order would help. 2. The Question of where to put this stuff pops up again and again (IRC, Stackoverflow). We, as a Communety, should have a standard answer to this. What do you guys think? -- 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: bug in partition?
Thanks for the hint. And don't worry about the meaning of this function. :) Name parameter has no use. And the regex stuff's for the url. Razvan -- 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: Using clojure-csv
clojure-csv is not a part of clojure-contrib. What is at $extra_classpath? For this to work, it would need to include the jar for clojure-csv. - Chas P.S. Mostly off-topic: the sooner you can get away from whatever re-packaging your distro has put together for Clojure, the better off you'll be. Linux package managers are generally not kind with Java (or python or ruby, etc) libraries, at least in my experience. On Jun 14, 2011, at 3:26 PM, octopusgrabbus wrote: > I am trying to use clojure-csv, but am having a lot of cockpit error. > > Here is my current configuration: > Running Clojure 1.2.1. > Modified a shell script installed by Synaptic to include clojure- > contrib.jar: > > exec java -cp /usr/share/java/clojure.jar:/usr/share/java/clojure- > contrib.jar"$extra_classpath" clojure.main "$@" > > clojure.jar and clojure-contrib.jar are links > lrwxrwxrwx 1 root root 25 2011-06-09 18:38 /usr/share/java/ > clojure-contrib.jar -> clojure-contrib-1.2.0.jar > lrwxrwxrwx 1 root root 17 2011-06-09 18:23 /usr/share/java/ > clojure.jar -> clojure-1.2.1.jar > c > > This fails: > > (ns test-csv > (:import (java.io BufferedReader))) > (use clojure-csv.core) > > with java.lang.ClassNotFoundException: clojure-csv.core > (NO_SOURCE_FILE:6) > > What am I doing wrong? > > Thanks. > cmn > > -- > 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: hammock driven development...
It might get people to quit looking at their infernal phones and laptops for 5 minutes. ;) -- Devin Walters On Tuesday, June 14, 2011 at 2:50 PM, Laurent PETIT wrote: > Would be very funny if for the upcoming clojure conj, attendants as > well as speakers were all lying in hammocks ! > That certainly would make the Buzz ! :-D > > 2011/6/12 Nick Brown mailto:nwbr...@gmail.com)>: > > Going for walks also helps me. Having some form a mild physical > > activity that I don't have to concentrate on seems to help me think. > > It can be a walk around the block, a hike through the park, or just > > walking around the office. You also get the added benefits of it > > being good for your health, and you can get away with it easier at > > work. > > And while I like my hammock, lying down it in often results in me > > falling asleep (and waking up covered in mosquito bites). Though I > > seem to remember Rich suggesting much of your thinking goes on while > > you are asleep (but in your bed will probably result in fewer mosquito > > bites, especially in North Carolina summers). > > > > I think my notes from that talk read something like this: > > Bring hammock to work. :) > > Go to sleep sober. :( > > > > Nick Brown > > http://standardout.wordpress.com/ > > > > On Jun 9, 1:09 pm, Brian Marick http://exampler.com)> > > wrote: > > > On Jun 9, 2011, at 3:27 PM, Jules wrote: > > > > > > > I'd also like to say this - TAKE THE HAMMOCK BIT SERIOUSLY - there is a > > > > growing body or research that indicates that you can problem solve > > > > better lying down. This may stem from the release of certain hormones, > > > > increased blood supply, maybe simply the fact that you are not wasting > > > > cycles and bandwidth trying to stay upright etc... > > > > > > I heard Guy Steele say he gets his best ideas in the shower. Since he has > > > more brilliant ideas than any ten impressive people, he must take a lot > > > of showers. > > > > > > I too get my best ideas in the shower. Or on long walks. > > > > > > Mileage varies. > > > > > > - > > > Brian Marick, Artisanal Labrador > > > Contract programming in Ruby and Clojure > > > Occasional consulting on Agilewww.exampler.com > > > (http://www.exampler.com),www.twitter.com/marick > > > (http://www.twitter.com/marick) > > > > -- > > 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 > > (mailto: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 > > (mailto: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 > (mailto: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 > (mailto: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: hammock driven development...
Would be very funny if for the upcoming clojure conj, attendants as well as speakers were all lying in hammocks ! That certainly would make the Buzz ! :-D 2011/6/12 Nick Brown : > Going for walks also helps me. Having some form a mild physical > activity that I don't have to concentrate on seems to help me think. > It can be a walk around the block, a hike through the park, or just > walking around the office. You also get the added benefits of it > being good for your health, and you can get away with it easier at > work. > And while I like my hammock, lying down it in often results in me > falling asleep (and waking up covered in mosquito bites). Though I > seem to remember Rich suggesting much of your thinking goes on while > you are asleep (but in your bed will probably result in fewer mosquito > bites, especially in North Carolina summers). > > I think my notes from that talk read something like this: > Bring hammock to work. :) > Go to sleep sober. :( > > Nick Brown > http://standardout.wordpress.com/ > > On Jun 9, 1:09 pm, Brian Marick wrote: >> On Jun 9, 2011, at 3:27 PM, Jules wrote: >> >> > I'd also like to say this - TAKE THE HAMMOCK BIT SERIOUSLY - there is a >> > growing body or research that indicates that you can problem solve better >> > lying down. This may stem from the release of certain hormones, increased >> > blood supply, maybe simply the fact that you are not wasting cycles and >> > bandwidth trying to stay upright etc... >> >> I heard Guy Steele say he gets his best ideas in the shower. Since he has >> more brilliant ideas than any ten impressive people, he must take a lot of >> showers. >> >> I too get my best ideas in the shower. Or on long walks. >> >> Mileage varies. >> >> - >> Brian Marick, Artisanal Labrador >> Contract programming in Ruby and Clojure >> Occasional consulting on Agilewww.exampler.com,www.twitter.com/marick > > -- > 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: Vim Nailgun setup - access to REPL from outside Vim
You may also want to have a look at slimv. http://www.vim.org/scripts/script.php?script_id=2531 It performs quite nice (can't compare it with vimclojure though, 'cause I don't know vimclojure). Razvan -- 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
Using clojure-csv
I am trying to use clojure-csv, but am having a lot of cockpit error. Here is my current configuration: Running Clojure 1.2.1. Modified a shell script installed by Synaptic to include clojure- contrib.jar: exec java -cp /usr/share/java/clojure.jar:/usr/share/java/clojure- contrib.jar"$extra_classpath" clojure.main "$@" clojure.jar and clojure-contrib.jar are links lrwxrwxrwx 1 root root 25 2011-06-09 18:38 /usr/share/java/ clojure-contrib.jar -> clojure-contrib-1.2.0.jar lrwxrwxrwx 1 root root 17 2011-06-09 18:23 /usr/share/java/ clojure.jar -> clojure-1.2.1.jar c This fails: (ns test-csv (:import (java.io BufferedReader))) (use clojure-csv.core) with java.lang.ClassNotFoundException: clojure-csv.core (NO_SOURCE_FILE:6) What am I doing wrong? Thanks. cmn -- 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: No any? function
Looks good to me.
I wasn't familiar with the docs around (seq x) vs (not (empty? x)). That
seems like a good place to draw the language from.
-kb
On Tue, Jun 14, 2011 at 1:43 PM, Ambrose Bonnaire-Sergeant <
abonnaireserge...@gmail.com> wrote:
> Inspired by "seq"/"empty?" docstrings.
>
> not-any?
>
> Returns false if (pred x) is logical true for any x in coll,
> else true - same as (not (some pred coll)).
>
>
> some
>
> Returns the first logical true value of (pred x) for any x in coll,
> else nil. One common idiom is to use a set as pred, for example
> this will return :fred if :fred is in the sequence, otherwise nil:
> (some #{:fred} coll)
> Please use the idiom (not-any? pred coll) rather than (not (some pred
> coll))
>
> Thoughts?
>
> Ambrose
>
> On Wed, Jun 15, 2011 at 2:31 AM, Kevin Baribeau
> wrote:
>
>> I actually had the same thought as the OP when reading through docs not
>> too long ago.
>>
>> +1 for adding a pointer to "some" in the docstring of "not-any?"
>>
>> -kb
>>
>> On Tue, Jun 14, 2011 at 11:29 AM, Ambrose Bonnaire-Sergeant <
>> abonnaireserge...@gmail.com> wrote:
>>
>>> Hi David,
>>>
>>> any? would be redundant and less general than some, if I am not mistaken.
>>> Compare the docstrings for the hypothetical "any?".
>>>
>>> (some p coll)
>>> Returns the *first logical true value* of (pred x) for any x in coll,
>>> else *nil*.
>>>
>>> (any? p coll)
>>> Returns *true* if (pred x) is logical true for any x in coll,
>>> else *false*.
>>>
>>>
>>> Since *nil* and *false* are both falsy, "some" can be used as a
>>> predicate that is truthy
>>> when it finds truthy result, otherwise falsy. This is exactly the
>>> behavior expected from
>>> an any? function.
>>>
>>> "some" is a poster boy for Clojure's well thought out truthyness system,
>>> this is a great example
>>> of the types of general functions it allows.
>>>
>>> Perhaps a pointer to "some" should be added in the docstring of
>>> "not-any?". Although
>>> a quick look at the source makes it crystal clear. I wasn't aware of
>>> "not-any?"s existence,
>>> maybe noting it in "some"s docstring could be beneficial also.
>>>
>>> Thanks,
>>> Ambrose
>>>
>>> On Tue, Jun 14, 2011 at 3:08 PM, de1976 wrote:
>>>
Hello everyone. In looking through the API documentation, I've noticed
that there is a "not-any?" function available, but there is no
corresponding inverse "any?" function that I can find. There are,
however, "every?" and "not-every?" functions available. The closest I
could find was "some", but wouldn't it make sense to have an "any?"
function for more obvious consistency? Thanks.
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>>>
>>>
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>>
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>
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Re: No any? function
Inspired by "seq"/"empty?" docstrings.
not-any?
Returns false if (pred x) is logical true for any x in coll,
else true - same as (not (some pred coll)).
some
Returns the first logical true value of (pred x) for any x in coll,
else nil. One common idiom is to use a set as pred, for example
this will return :fred if :fred is in the sequence, otherwise nil:
(some #{:fred} coll)
Please use the idiom (not-any? pred coll) rather than (not (some pred coll))
Thoughts?
Ambrose
On Wed, Jun 15, 2011 at 2:31 AM, Kevin Baribeau wrote:
> I actually had the same thought as the OP when reading through docs not too
> long ago.
>
> +1 for adding a pointer to "some" in the docstring of "not-any?"
>
> -kb
>
> On Tue, Jun 14, 2011 at 11:29 AM, Ambrose Bonnaire-Sergeant <
> abonnaireserge...@gmail.com> wrote:
>
>> Hi David,
>>
>> any? would be redundant and less general than some, if I am not mistaken.
>> Compare the docstrings for the hypothetical "any?".
>>
>> (some p coll)
>> Returns the *first logical true value* of (pred x) for any x in coll,
>> else *nil*.
>>
>> (any? p coll)
>> Returns *true* if (pred x) is logical true for any x in coll,
>> else *false*.
>>
>>
>> Since *nil* and *false* are both falsy, "some" can be used as a predicate
>> that is truthy
>> when it finds truthy result, otherwise falsy. This is exactly the behavior
>> expected from
>> an any? function.
>>
>> "some" is a poster boy for Clojure's well thought out truthyness system,
>> this is a great example
>> of the types of general functions it allows.
>>
>> Perhaps a pointer to "some" should be added in the docstring of
>> "not-any?". Although
>> a quick look at the source makes it crystal clear. I wasn't aware of
>> "not-any?"s existence,
>> maybe noting it in "some"s docstring could be beneficial also.
>>
>> Thanks,
>> Ambrose
>>
>> On Tue, Jun 14, 2011 at 3:08 PM, de1976 wrote:
>>
>>> Hello everyone. In looking through the API documentation, I've noticed
>>> that there is a "not-any?" function available, but there is no
>>> corresponding inverse "any?" function that I can find. There are,
>>> however, "every?" and "not-every?" functions available. The closest I
>>> could find was "some", but wouldn't it make sense to have an "any?"
>>> function for more obvious consistency? Thanks.
>>>
>>> --
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>>
>>
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>
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Re: No any? function
I actually had the same thought as the OP when reading through docs not too long ago. +1 for adding a pointer to "some" in the docstring of "not-any?" -kb On Tue, Jun 14, 2011 at 11:29 AM, Ambrose Bonnaire-Sergeant < abonnaireserge...@gmail.com> wrote: > Hi David, > > any? would be redundant and less general than some, if I am not mistaken. > Compare the docstrings for the hypothetical "any?". > > (some p coll) > Returns the *first logical true value* of (pred x) for any x in coll, > else *nil*. > > (any? p coll) > Returns *true* if (pred x) is logical true for any x in coll, > else *false*. > > > Since *nil* and *false* are both falsy, "some" can be used as a predicate > that is truthy > when it finds truthy result, otherwise falsy. This is exactly the behavior > expected from > an any? function. > > "some" is a poster boy for Clojure's well thought out truthyness system, > this is a great example > of the types of general functions it allows. > > Perhaps a pointer to "some" should be added in the docstring of "not-any?". > Although > a quick look at the source makes it crystal clear. I wasn't aware of > "not-any?"s existence, > maybe noting it in "some"s docstring could be beneficial also. > > Thanks, > Ambrose > > On Tue, Jun 14, 2011 at 3:08 PM, de1976 wrote: > >> Hello everyone. In looking through the API documentation, I've noticed >> that there is a "not-any?" function available, but there is no >> corresponding inverse "any?" function that I can find. There are, >> however, "every?" and "not-every?" functions available. The closest I >> could find was "some", but wouldn't it make sense to have an "any?" >> function for more obvious consistency? 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 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: Simple Empty Vector Question
Yes that is correct. These forms are equivalent:
(defn login-page [] ...)
(def login-page (fn [] ))
Thanks,
Ambrose
On Wed, Jun 15, 2011 at 1:51 AM, octopusgrabbus wrote:
> In the following code (from Brian Carper's cow-blog)
>
> (defn login-page
> "Page to let an admin log in."
> []
> {:title "Login"
> :body [:div [:h3 "Log in"]
> (form-to [:post "/login"]
> (form-row "Username" "username" text-field)
> (form-row "Password" "password" password-field)
> (submit-row "Log in"))]})
>
> on the third line there are empty vector brackets. I believe this is
> defining the function as having now parameters. Is that correct?
>
> Thank you.
>
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Simple Empty Vector Question
In the following code (from Brian Carper's cow-blog)
(defn login-page
"Page to let an admin log in."
[]
{:title "Login"
:body [:div [:h3 "Log in"]
(form-to [:post "/login"]
(form-row "Username" "username" text-field)
(form-row "Password" "password" password-field)
(submit-row "Log in"))]})
on the third line there are empty vector brackets. I believe this is
defining the function as having now parameters. Is that correct?
Thank you.
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Early Registration has opened for Clojure Conj 2011!
http://clojure-conj.org Ticket, venue and initial speaker information has been posted. Sign up today! -- Christopher Redinger Clojure/core http://clojure.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
Re: No any? function
Hi David, any? would be redundant and less general than some, if I am not mistaken. Compare the docstrings for the hypothetical "any?". (some p coll) Returns the *first logical true value* of (pred x) for any x in coll, else *nil*. (any? p coll) Returns *true* if (pred x) is logical true for any x in coll, else *false*. Since *nil* and *false* are both falsy, "some" can be used as a predicate that is truthy when it finds truthy result, otherwise falsy. This is exactly the behavior expected from an any? function. "some" is a poster boy for Clojure's well thought out truthyness system, this is a great example of the types of general functions it allows. Perhaps a pointer to "some" should be added in the docstring of "not-any?". Although a quick look at the source makes it crystal clear. I wasn't aware of "not-any?"s existence, maybe noting it in "some"s docstring could be beneficial also. Thanks, Ambrose On Tue, Jun 14, 2011 at 3:08 PM, de1976 wrote: > Hello everyone. In looking through the API documentation, I've noticed > that there is a "not-any?" function available, but there is no > corresponding inverse "any?" function that I can find. There are, > however, "every?" and "not-every?" functions available. The closest I > could find was "some", but wouldn't it make sense to have an "any?" > function for more obvious consistency? 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 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: Vim Nailgun setup - access to REPL from outside Vim
Thanks Meikel. This did exactly what I wanted. Thanks for your efforts. From: clojure@googlegroups.com [mailto:clojure@googlegroups.com] On Behalf Of Meikel Brandmeyer Sent: Tuesday, June 14, 2011 7:25 AM To: clojure@googlegroups.com Subject: Aw: Vim Nailgun setup - access to REPL from outside Vim Hi, do it the other way around. First start the repl. Then do a "(require 'vimclojure.nails) (vimclojure.nails/start-server-thread)". This will setup the vim backend in the background while you can still work with the repl. Hope that helps. Sincerely Meikel -- 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: Svar: transients are not designed to be bashed in-place
On Tue, Jun 14, 2011 at 1:56 AM, alsor wrote: > Just out of curiosity, are these some implementation's peculiarities or > it's intentional design? Intentional design. 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: Svar: Ideas from Fortress
>From my emacs start up file: ;; prevent slime to crash when encountering non ascii char (set-language-environment "UTF-8") (setq slime-net-coding-system 'utf-8-unix) Le 14 juin 2011 06:16, "jlk" a écrit : > Hello > > Is there a trick to making this work in emacs/slime? > > If I enter pi in the *slime-repl clojure* buffer: > cond: Coding system iso-latin-1-unix not suitable for "43(:emacs- > rex (swank:listener-eval \"π\") \"jlk.math\" :repl-thread 19) > so the encoding type is not UTF, but I can't set it using C-x Ret f > > Pi character works fine in the *infererior-lisp* buffer > > - Lachlan > > > On Jun 11, 3:19 am, Stuart Sierra wrote: >> Symbols already permit Unicode characters. The Clojure reader assumes >> UTF-8. This may or may not render in G. Groups, though: >> >> user=> (def π (Math/PI)) >> #'user/π >> user=> π >> 3.141592653589793 >> >> Of course, there's no actual layout, but you could write code that reads a >> mathematical expression in Clojure and generates TeX or something. >> >> -Stuart Sierra >> clojure.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 -- 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: Aw: Re: Aw: Re: transients are not designed to be bashed in-place
Yes, you're right - if I'm going to use transients, then I have to be sure that .search is single-threaded. Because I can't have both - transient's mutable properties and STM's properties of atom. So, in my case I can use combination of atom and transients - because I know exact Searcher's implementation that I'm using, but in more general case I should not use transients at all - because they're leaking into third-party API call. 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
No any? function
Hello everyone. In looking through the API documentation, I've noticed that there is a "not-any?" function available, but there is no corresponding inverse "any?" function that I can find. There are, however, "every?" and "not-every?" functions available. The closest I could find was "some", but wouldn't it make sense to have an "any?" function for more obvious consistency? 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
Re: Aw: Re: transients are not designed to be bashed in-place
Oh no, now the swap! might be a problem... from its doc: "Note that f may be called multiple times, and thus should be free of side effects", and I think it's no more side-effect free when we are using transients. So close! :-) -- 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: Aw: Re: transients are not designed to be bashed in-place
Wow, that's really good idea! Returned value of conj! is not ignored, and overall function should not produce unnecessary garbage on the heap. 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
Re: Svar: transients are not designed to be bashed in-place
Just out of curiosity, are these some implementation's peculiarities or it's intentional design? -- 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: transients are not designed to be bashed in-place
The thing is, this .search method will invoke MyCustomCollector.collect method many times, for each matching document. -- 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: transients are not designed to be bashed in-place
Thanks for the interesting point about possible parallel implementation of search method. I think I will stay with atom implementation, because in this particular case I don't need to squeeze out maximum performance from this function. But I wonder, what if in some similar case the performance will be very critical - then the only choice will be to implement Collector in Java using one of the Java's mutable collection and then convert it into Clojure's persistent collection? Because I really don't want to produce unnecessary objects on the heap while collecting all results. 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
Re: SQL queries on csv-files
Although it may be overkill for you, take a look at Teiid: http://teiid.org On Jun 14, 5:30 am, finbeu wrote: > Hello, > > I have a couple of csv files that are actually dumped data from SQL > tables. These tables have proper relationships with key, foreign keys > so they can be easily joined using SQL. > > I would like to load them into memory and then appy SQL queries on > that data. So in fact, I'm looking for a clojure in-memory SQL > database that allows me to slurp the csv files, treat them as tables > and run sql queries on them. > > I already looked into clojure.set and this would work. But is there > another library to look into? Maybe a clojure SQL set of macros that > allow to issue "real" SQL queries? I don't want to install sqlite and > jdbc-drivers and stuff like this. Just load csv file into memory and > run SQL queries within clojure. > > Thx. > > Finn -- 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
SQL queries on csv-files
Hello, I have a couple of csv files that are actually dumped data from SQL tables. These tables have proper relationships with key, foreign keys so they can be easily joined using SQL. I would like to load them into memory and then appy SQL queries on that data. So in fact, I'm looking for a clojure in-memory SQL database that allows me to slurp the csv files, treat them as tables and run sql queries on them. I already looked into clojure.set and this would work. But is there another library to look into? Maybe a clojure SQL set of macros that allow to issue "real" SQL queries? I don't want to install sqlite and jdbc-drivers and stuff like this. Just load csv file into memory and run SQL queries within clojure. Thx. Finn -- 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: lein and emacs
If you need extra libraries in your classpath, you can give lein-oneoff plugin a try: https://github.com/mtyaka/lein-oneoff Using lein-oneoff, you should first define your dependencies in a clojure file (mydeps.clj) and then issuing the following command: lein oneoff --swank mydeps.clj This will start a swank server with a properly adjusted classpath. You still need to create the mydeps.clj file, but you don't need to create a brand new leiningen project. Regards, Matjaz On Tue, Jun 14, 2011 at 1:36 PM, Rasmus Svensson wrote: > 2011/6/14 Vincent : > > > > Dear all , > > I am using emacs with lein > > I want to try out repl in emacs , but without creating a new project > using > > lien > > Presently , following steps i have to do to start repl > > 1. lein new project1 ( dummy project as i have only run repl ) > > 2. cd project1 > > 3. modifying project.clj to set dependencies and dev depend. > > 4. run lein deps > > 5. run lein swank > > If project already there , then step 2 , step 5 > > 6. in emacs , M-x slime-connect .v > > Thanks in advance > > Vincent > > If you install swank-clojure as a leiningen plugin, it installs a > shell script for this in ~/.lein/bin/swank-clojure: > > 0. lein plugin install swank-clojure 1.3.1 (if you haven't done this) > 1. ~/.bin/bin/swank-clojure (or > %USERPROFILE%/.lein/bin/swank-clojure.bat on Windows) > 2. M-x slime-connect > > This will give you a repl with _some_ version of Clojure and no > contrib or any extra libraries. (If you need to control the version > and libraries used, you should be using a project.) > > // raek > > -- > 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: lein and emacs
2011/6/14 Vincent : > > Dear all , > I am using emacs with lein > I want to try out repl in emacs , but without creating a new project using > lien > Presently , following steps i have to do to start repl > 1. lein new project1 ( dummy project as i have only run repl ) > 2. cd project1 > 3. modifying project.clj to set dependencies and dev depend. > 4. run lein deps > 5. run lein swank > If project already there , then step 2 , step 5 > 6. in emacs , M-x slime-connect .v > Thanks in advance > Vincent If you install swank-clojure as a leiningen plugin, it installs a shell script for this in ~/.lein/bin/swank-clojure: 0. lein plugin install swank-clojure 1.3.1 (if you haven't done this) 1. ~/.bin/bin/swank-clojure (or %USERPROFILE%/.lein/bin/swank-clojure.bat on Windows) 2. M-x slime-connect This will give you a repl with _some_ version of Clojure and no contrib or any extra libraries. (If you need to control the version and libraries used, you should be using a project.) // raek -- 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
Aw: Vim Nailgun setup - access to REPL from outside Vim
Hi, do it the other way around. First start the repl. Then do a "(require 'vimclojure.nails) (vimclojure.nails/start-server-thread)". This will setup the vim backend in the background while you can still work with the repl. Hope that helps. Sincerely Meikel -- 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
Vim Nailgun setup - access to REPL from outside Vim
I setup Vim to use nailgun server. I start the nailgun server using "lein vimclojure" plugin and use the VimClojure vim plugin to connect to it. Everything works great and I can start a REPL inside Vim using the command :ClojureRepl. All of this is on Windows 7. However, I want to start a REPL on the same nailgun server instance from outside of Vim - from my command prompt. So that I can send my expressions to the server from the Vim editor but then switch to my command prompt REPL (in another window) to test it out. Is there a command/technique to do this? Thanks Shoeb -- 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: lein and emacs
Vincent writes: Hi! > I am using emacs with lein Depending on you clojure-mode version (I think you need 1.9.1), it's possible that M-x clojure-jack-in RET does everything needed to fire up a SLIME REPL in emacs. Have a look at the thread "Radically simplified Emacs and SLIME setup" starting with the message Bye, Tassilo -- 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
lein and emacs
Dear all , I am using emacs with lein I want to try out repl in emacs , but without creating a new project using lien Presently , following steps i have to do to start repl 1. lein new project1 ( dummy project as i have only run repl ) 2. cd project1 3. modifying project.clj to set dependencies and dev depend. 4. run lein deps 5. run lein swank If project already there , then step 2 , step 5 6. in emacs , M-x slime-connect .v Thanks in advance Vincent -- 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: rand-nth throwing an exception
I don't think either is worse or better, the lack of consistency is imho worse than either of the approaches. One has to remember that in the corner case function A behaves this way but function B behaves the other way. jarek -- In theory, there is no difference between theory and practice. But in practice, there is. -- 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: Wisdom sought for functional iterative processing
Matthew Phillips writes: > The only way I can think of to write it in Clojure is: > > (reduce > (fn [items op] > (let [items1 (if (:delete op) (drop-index (:delete op) items) > items)] > (if (:insert op) (cons (:insert op) items1) items1))) > items ops) > > i.e. I'm using a cascade of conditional let's. This isn't _too_ bad in > this case, but you can image how unreadable this could get. To avoid a "cascade of lets" I've occasionally defined a function called conj-if (or disj-if or assoc-if...). Like so: (defn conj-if [coll test x] (if test (conj coll x) coll)) (fn [items op] (-> (conj-if (foo? op) "one") (conj-if (bar? op) "two"))) (conj-if (baz? op) "three"))) That could be generalized, but I've so far never gotten into a situation where I've felt the need to. (defn call-if [x test f & [args]]; needs a better name (if test (apply f x args) x)) (fn [items op] (-> (call-if (foo? op) assoc "foo" 1) (call-if (bar? op) dissoc "bar") (call-if (baz? op) empty))) On the other hand the cascading lets are really not that bad especially if you pull any complex predicate or value-manipulation logic out into separate functions: (fn [items op] (let [items (if (foo? op) (assoc items "foo" 1) items) items (if (bar? op) (dissoc items "bar") items) items (if (baz? op) (empty items) items)] items)) -- 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: Wisdom sought for functional iterative processing
On 14 June 2011 12:37, Matthew Phillips wrote: > The only way I can think of to write it in Clojure is: > > (reduce > (fn [items op] >(let [items1 (if (:delete op) (drop-index (:delete op) items) > items)] > (if (:insert op) (cons (:insert op) items1) items1))) > items ops) > > i.e. I'm using a cascade of conditional let's. This isn't _too_ bad in > this case, but you can image how unreadable this could get. > How about something like this (borrowing from Mark's loop/recur suggestion above): (defn maybe-delete [items op] (if-let [index (:delete op)] (drop-index index items) items)) (defn maybe-insert [items op] (if-let [new-item (:insert op)] (cons new-item items) items)) (loop [items items ops ops] (if-not ops items (let [op (first op)] (recur (-> items (maybe-delete op) (maybe-insert op)) (next ops) Looks more verbose on the surface, but I'm sure you could abstract away some common bits of maybe-delete and maybe-insert using a macro. Regards, Stuart -- 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
Aw: Re: Aw: Re: transients are not designed to be bashed in-place
Hi again, ok. This is not entirely correct. It depends on how your searcher works. If it works on several threads in parallel, there would be an issue, but the transient would barf in that case anyway. So you would get an exception and hence be safe. Sincerely Meikel -- 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
