From: Robert Klemme <shortcutter@...>
Date: 2008-01-31T19:29:09+09:00
Subject: Re: counting the number of repititions in an array

2008/1/31, Stefano Crocco <stefano.crocco@alice.it>:
> Alle Wednesday 30 January 2008, Adam Akhtar ha scritto:
> > res[a] = res[nil] + 1
>
> res[a] = res[a] + 1
>
> Aside from this, yes, that's how it works

Just adding a point because it seems this might not have become
totally clear from the thread: the fact that the Hash returns 0 for a
missing key is caused by how the Hash is constructed.  Normally a hash
returns nil for unknown keys:

irb(main):001:0> {}[1]
=> nil
irb(main):002:0> Hash.new(0)[1]
=> 0
irb(main):003:0> Hash.new("foobar")[1]
=> "foobar"

Kind regards

robert

-- 
use.inject do |as, often| as.you_can - without end