From: Tim Hunter <TimHunter@...>
Date: 2008-06-12T06:50:50+09:00
Subject: Re: Array inject function problem

Jason Lillywhite wrote:
> So let me ask you this:
> 
> going back to
> 
> sum = [1,3,5].inject(0) {|s,e| s+e}
> puts sum
> 
> what if you want to return an array that shows each step of the way, 
> such that:
> 
> sum => [1,4,9]
> 
> ??
irb(main):003:0> steps = []
=> []
irb(main):004:0> sum = [1,3,5].inject(0) {|s,e| steps << s+e; steps.last}
=> 9
irb(main):005:0> p steps
[1, 4, 9]


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