On Wed, Oct 15, 2008 at 8:21 AM, Jim Menard <[EMAIL PROTECTED]> wrote: > > On Wed, Oct 15, 2008 at 7:46 AM, Timothy Pratley > <[EMAIL PROTECTED]> wrote: >> >> Can I get some help with (map f coll)... >> >> What I want to do is map a java function that takes 2 arguments over a >> list >> where the first argument is the index into the list itself >> and the second argument is taken from the list >> >> The problem being map uses a function of 1 argument. >> Does that mean I need to create my own map, or is there a better way? > > map can take more than one argument. If it has N arguments, it calls f > with N arguments, each taken from the Nth value of each collection. So > you should be able to pass in an infinite sequence like this UNTESTED > code: > > (map f coll (range (count coll)))
Rather than (range (count coll)), I would use (iterate inc 0), which incurs no overhead for counting the argument. Best, Graham --~--~---------~--~----~------------~-------~--~----~ 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 To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
