From: Hal Fulton <hal9000@...>
Date: 2005-08-29T10:55:53+09:00
Subject: Re: [Q] how to unflatten a flat-array

SHIGETOMI, Takuhiko wrote:
> dear guys,
> 
> i am seeking a smart way to do ...
> 
>    [ 1, 2, 3, 4, 5, 6, ... ]  =>  [ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], ... ]
> 
> especialy, the way hopefully will work safety when the source array's
> size is odd or zero.
> 

I have used something like:

   arr = array.dup
   result = []
   while ! arr.empty?
     result << arr.slice!(0..1)
   end

Would that work for you?


Hal