On Fri, 10 Aug 2001, Jennifer Pan wrote:
> I have two list,
> @list1 and @list2, each element @list1 is unique (could be a hash I
> suppose)
>
> I want to find out all the elements @list2 that is an element in list1
> and have appeared two or more times
I would break this down algorithmically into two separate steps:
* find out which elements in @list2 are duplicated values
* find the matching elements in the subset of @list2 and @list1
Each step is well documented in 'The Perl Cookbook'.
-- Brett
http://www.chapelperilous.net/btfwk/
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Where will it all end? Probably somewhere near where it all began.
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