From: Florian Frank <flori@...>
Date: 2005-12-22T05:29:25+09:00
Subject: Re: move to front of array

Payton Swick wrote:

> I have an array of Strings, and I'd like to find one of the items by 
> Regexp, then move that item to the front of the array, eg:
>
> array = %w(a B c d Cool e f G)
> array.unshift(array.slice!(array.index(array.find { |i| i =~ /cool/i 
> }))) if array.find { |i| i =~ /cool/i }


In 1.8.x:

require 'enumerator'
if f = array.enum_for(:each_index).find { |i| array[i] =~ /cool/i }
  array.unshift array.delete_at(f)
end


In 1.9.x you can do:

array.unshift array.delete_at(array.index { |x| x =~ /cool/i })

-- 
Florian Frank