Re: apply inc
Thanks everyone, in the apply function source code I see ([^clojure.lang.IFn f args] (. f (applyTo (seq args Seems the (applyTo (seq args)) returns arg parameters, And the f is invoked only once: (. f args) -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: apply inc
Is there an implicit question there? If so, does this (https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/IFn.java) help? '(Devin Walters) On Aug 10, 2013, at 10:55 PM, drclj deepikaro...@gmail.com wrote: Thanks everyone, in the apply function source code I see ([^clojure.lang.IFn f args] (. f (applyTo (seq args Seems the (applyTo (seq args)) returns arg parameters, And the f is invoked only once: (. f args) -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: apply inc
drclj deepikaro...@gmail.com writes: Thanks everyone, in the apply function source code I see ([^clojure.lang.IFn f args] (. f (applyTo (seq args Seems the (applyTo (seq args)) returns arg parameters, And the f is invoked only once: (. f args) I think you’re missing that `.` is a special form with special evaluation rules. The following forms are all equivalent: (. f (applyTo (seq args)) (. f applyTo (seq args)) (.applyTo f (seq args)) With the last being syntactic sugar converted during macro-expansion to the middle form. So there’s no `applyTo` *function*, just the `applyTo` *method* of IFn instance `f`. OOC, do you have a background using R or similar languages? I was confused myself learning R, because what R calls `apply` is nothing like what Lisps call `apply` and (as others in this thread pointed out) is more similar to what Clojure calls `map`. -Marshall -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: apply inc
Looking at it as (. f applyTo (seq args)) The object instance of IFn 'f' calls the method 'applyTo' with sequence 'args'. From http://clojure.org/java_interop (*.* instance-expr member-symbol)(*.* instance-expr (method-symbol args*)) or(*.* instance-expr method-symbol args*) That makes perfect sense. Thanks. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
apply inc
Hi there: Why does (apply str [2 3]) work and not (apply inc [4 5]) though (apply inc [4]) does work? Thanks. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: apply inc
(apply str [2 3]) does the same thing as (str 2 3), which is to attempt to convert each of its args to a string, then concatenate them all. (apply inc [4 5]) does the same thing as (inc 4 5), which is to throw an exception because inc takes exactly one argument and returns that value plus 1. This site has more examples of apply, and many other Clojure functions, too: http://clojuredocs.org/clojure_core/clojure.core/apply Andy On Sat, Aug 10, 2013 at 7:21 AM, drclj deepikaro...@gmail.com wrote: Hi there: Why does (apply str [2 3]) work and not (apply inc [4 5]) though (apply inc [4]) does work? Thanks. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: apply inc
How many args does inc supports ? Only one. (apply inc [ 1 3 ]) is the same as (inc 1 3) which would also trigger an arity exception. apply does not call the given fn on each item in the collection it's given, it calls it once with the whole collection as the argument list. (map inc [1 3]) calls inc on every item in the vector and would return (2 4). Hope it's clear. Luc P. Hi there: Why does (apply str [2 3]) work and not (apply inc [4 5]) though (apply inc [4]) does work? Thanks. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- Softaddictslprefonta...@softaddicts.ca sent by ibisMail from my ipad! -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: apply inc
When you write (apply inc [4 5]) it's like (inc 4 5) But the inc function accepts only one argument. -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups Clojure group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
