From: newto ruby <lists@...>
Date: 2012-04-20T06:53:25+09:00
Subject: finding duplicates in an array and its index number

Hi,

I have following array and I am trying to find if there are duplicates
in the array. I also want to find out their index.

e.g.

a=[1,2,3,1,3]

Here 1 is a duplicate which comes twice and its index is 0 and 3 in the
array.

Any suggestions?

Thanks

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