return index of a value

2010-09-27 Thread Glen Rubin
I have a vector of numbers [0 99 3334 53 2 5 99 2 55 63] I'd like to find the first index of a particular value. For example if the value was 99 then I want to return 1, b/c the index of 99 is 1. I can do this with a loop/recur structure comparing each value in the list to my desired value,

Re: return index of a value

2010-09-27 Thread Stuart Halloway
Hi Glen, Finding the *first* index isn't very Clojurish, what you want is to find *all* the indexes, lazily. Then if you want the first one, just call first. (use '[clojure.contrib.seq-utils :only (positions)]) (positions #{99} [0 99 3334 53 2 5 99 2 55 63]) - (1 6) Cheers, Stu I have a

Re: return index of a value

2010-09-27 Thread Michael Gardner
On Sep 27, 2010, at 9:45 AM, Glen Rubin wrote: I have a vector of numbers [0 99 3334 53 2 5 99 2 55 63] I'd like to find the first index of a particular value. For example if the value was 99 then I want to return 1, b/c the index of 99 is 1. I can do this with a loop/recur structure

Re: return index of a value

2010-09-27 Thread Glen Rubin
interesting! thx guys! On Sep 27, 10:45 am, Glen Rubin rubing...@gmail.com wrote: I have a vector of numbers [0 99 3334 53 2 5 99 2 55 63] I'd like to find the first index of a particular value.  For example if the value was 99 then I want to return 1, b/c the index of 99 is 1.  I can do