From: lasitha <lasitha.ranatunga@...>
Date: 2009-03-12T15:07:43+09:00
Subject: Re: change (and update) values of hash

On Thu, Mar 12, 2009 at 11:10 AM, Jason Lillywhite
<jason.lillywhite@gmail.com> wrote:
> how would I do stuff to each value of a hash and return a modified hash?
> h = {"a"=> 3, "b"=> 5}
> multiply each value by 2 and return
> h = {"a"=> 6, "b"=> 10}

One way (among several):
$: irb
01> h = { 'a' => 3, 'b' => 5 }
--> {"a"=>3, "b"=>5}
02> h.inject(h) {|h, (k, v)| h[k] = v * 2; h }
--> {"a"=>6, "b"=>10}

solidarity,
lasitha.