#!/usr/bin/perl
# http://perlmonks.org/?node_id=1212142
use strict;
use warnings;
my %cats = ( blackcat=>5, whitecat=>10,orangecat=>20 );
while(<DATA>)
{
print;
s#([a-zA-Z][A-Za-z_0-9]+)# $cats{$1} // $1 #ge;
print;
}
__DATA__
log10(blackcat)*whitecat*(log10(orangecat))
Outputs:
log10(blackcat)*whitecat*(log10(orangecat))
log10(5)*10*(log10(20))
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