From: Robert Feldt <feldt@...>
Date: 2001-10-11T09:09:31+09:00
Subject: [ruby-talk:22413] Re: list comprehensions alike Python ???

On Thu, 11 Oct 2001, Paul Prescod wrote:

> Out of curiousity, what would the Ruby for this look like:
> 
> >>> arr = [x*x for x in range(0,10) if x%2==0]
> >>> arr
> [0, 4, 16, 36, 64]
> 
> A combination of filter and map?
> 
One alternative is:
irb(main):001:0> (0...10).select{|v| v%2==0}.map{|v| v*v}
[0, 4, 16, 36, 64]

but there are other.

/Robert