If you're checking $x aginst your list multiple times, it might be more efficient to use a hash:
my @list = (10,11,12,13,14,15,17,18,22,23,24,25,26,27,28,29,30,31,32,3
+3,34,35 );
my %hash;
@hash{@list} = (1) x @list;
# This solution only makes sense if you're
# making the comparison multiple times
foreach my $x (1..1000)
{
if ($hash{$x})
{
print "$x is in the list\n";
}
}
You spend some initial setup time creating the hash, but then all your comparisons are O(1).
-Matt
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