As a general rule, you should avoid changing an array you are iterating over. That's bound to cause all kinds of headaches. Also, it is favourable to name variables by what they mean, not by what they contain. Here, $num
is a bad name. $index
is better, so are $i
Here's my stab at the problem.
my @colors = qw(red green blue yellow pink purple brown);
my @drop = qw(pink brown);
foreach my $drop_color (@drop)
my $index = 0;
foreach my $color (@colors)
if ( $color eq $drop_color )
splice (@colors, $index, 1);
print "@colors \n";
Besides being clearer, this also works with n elements in whatever array, whereas your solution hardcodes two elements in the @drop
You can lead your users to water, but alas, you cannot drown them.
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