From: Felix Windt Date: 2007-09-08T03:01:56+09:00 Subject: Re: array handling advice ------=_NextPart_000_022A_01C7F13D.EA644F50 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit > -----Original Message----- > From: Chris McMahon [mailto:christopher.mcmahon@gmail.com] > Sent: Friday, September 07, 2007 10:40 AM > To: ruby-talk ML > Subject: array handling advice > > > There is probably a simple way to do this, but I'm drawing a blank: > > I have an arbitrarily large input array, like > > input = ['a','b','c','d','e','f','g'] > > and three target arrays like > > targ_one = [] > targ_two = [] > targ_three = [] > > I want to deal out the elements of this array into three target arrays > so they end up like > > ['a','d','g'] > ['b','e'] > ['c','f'] > > It seems there should be an elegant way to do this, but I haven't hit > on it. Suggestions would be welcome. > irb(main):001:0> a = [1,2,3,4,5,6,7,8,9] => [1, 2, 3, 4, 5, 6, 7, 8, 9] irb(main):002:0> b = [[], [], []] => [[], [], []] irb(main):003:0> a.inject(0){|bucket, item| b[bucket] << item; bucket < 2 ? bucket + 1 : 0} => 0 irb(main):004:0> b => [[1, 4, 7], [2, 5, 8], [3, 6, 9]] irb(main):005:0> Though I don't know if that would be considered elegant. 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