it doesn't matter which array the values are removed from.

In that case, it is very simple. You iterate over one array and rebuild it. If a value shows up in the second array, you just ignore it as you are rebuilding. Use a hash to store the values so that lookup is fast... 

my @array1 = (1, 2, 3, 4, 5); 
my @array2 = (2, 4, 6, 8, 10); 
my %hash = map {$_=>1} @array2; 
@array1 = grep { not exists $hash{$_} } @array1;
print "@array1\n";

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-sauoq
"My two cents aren't worth a dime.";

In reply to Re^3: comparing arrays by sauoq
in thread comparing arrays by Anonymous Monk

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