From: Vitaliy Yanchuk <fuksito@...>
Date: 2010-07-20T22:47:27+09:00
Subject: Count occurences of vars in array

Hello, everyone.

Would be grateful if someone can tell, how can I do shortly (mb with one
method) from such example array

["a", "b", "a", "c", "c", "b", "b"]

The result
a => 2
b => 3
c => 2

So, to count number of occurances
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