From: Vitaliy Yanchuk <fuksito@...>
Date: 2010-07-21T04:28:09+09:00
Subject: Re: Count occurences of vars in array

Check this out

['a', 'b', 'a', 'b', 'c', 'c', 
'c'].group_by{|o|o}.collect{|k,v|{k,v.size}}.to_yaml"

Result:
- a: 2
- b: 2
- c: 3


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