my %newhash =                           
              map  { $_ => $refdes_bom{$_} }  
              grep {     CPN($refdes_bom{$_}) 
                     and ITEM($refdes_bom{$_}) }
              keys %refdes_bom;

[download]
I have tried to make that basic routine you gave me work but failed as it will not process the keywords bar and foo. The error message I get is :
Undefined subroutine &main::CPN called at compal_test.pl line 37.
Am I missing the obvious basics here ?

In reply to Re: Re: Re: Re: Optimizing quickly hash tables by checking multiple conditions by juo
in thread Optimizing quickly hash tables by checking multiple conditions by juo

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