From: Anurag Priyam <anurag08priyam@...>
Date: 2011-01-14T04:33:53+09:00
Subject: Re: Retrieving and copying element from array

> ["category: cat1",
>  "item1, item2, item3",
>  "category: cat2",
>  "item1",
>  "category: cat3",
>  "item1, item2, item3, item4",]
>
> How can I have a new array like this:
>
> [["cat1", "item1", "item2", item3"],
>  ["cat2", "item1"],
>  ["cat3", "item1", "item2", "item3", "item4"]
> ]
>

If your initial array is called 'list' :

>> result = []
>> list.each_slice(2) {|i, j| result.push(i.sub(/category: /, '')); b.push(*j.split(', '))}

Iterate over your list in pairs (each_slice), and remove 'category: '
from the first element, while split the second element over ', ' and
append the result to an array.

-- 
Anurag Priyam
http://about.me/yeban/