Re: [MacPerl] perl to c/c+/

["J. Linder" <jann@jann.com>]

>First, from the camel book there is the classic one line which
>creates an array and removes all unique entries.
>
>   while (<>) { $seen{$_}++; }  # only see what is not seen
>
>This is blazingly fast.
>


Does it remove all unique entries, or ensure that entries in the $seen{}
array are unique?  ie, does it uniq -d or uniq -u????

Thanks




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