> figure out how to list indexes of elements after comparing two arrays

The easiest way is to increment a variable $index++ inside your @B loop.

Please note that swapping the loops would make sense here.

The most efficient way though would be using a hash %A to lookup set elements in @A thus avoiding that loop.

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery FootballPerl is like chess, only without the dice

In reply to Re: Get identical elements and index from 2 Arrays in Perl by LanX
in thread Get identical elements and index from 2 Arrays in Perl by rebkirl

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