From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2008-03-25T18:26:30+09:00
Subject: Re: numbers of a record in an array

On Tue, Mar 25, 2008 at 10:09 AM, Bu Mihai <mihai.bulhac@yahoo.com> wrote:
> a have an array array=["a","b","c","a","b"]
>  how can i find the numbers of "a", "b","c" items in the array?

Here's one way:

irb(main):006:0> a = %w{a b a c b a c c}
=> ["a", "b", "a", "c", "b", "a", "c", "c"]
irb(main):007:0> h = Hash.new {|h,k| h[k] = 0}
=> {}
irb(main):008:0> a.each {|x| h[x] += 1}
=> ["a", "b", "a", "c", "b", "a", "c", "c"]
irb(main):009:0> h
=> {"a"=>3, "b"=>2, "c"=>3}

Hope this helps,

Jesus.