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Re: Unable to Understand grep and hash use for prime no.

by soonix (Canon)
on Aug 04, 2015 at 18:59 UTC ( [id://1137415]=note: print w/replies, xml ) Need Help??

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  1. or download this
       my %is_prime;
   @primes = grep { 
...
                or 
                ( $is_prime{$_} = is_prime($_) )
             } @numbers;

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