I have an array @a that contains some data. @b contains a subset of @a. I'm trying to find a concise way to create @c, which will essentially contain everything in @a that is not in @b. I realize that I can do something like this:

for my $a (@a) {
  unless (grep(/^$a$/,@b)) {
    push(@c,$a);
  }
}
[download]

This method is crude and slow, but it does seem to work. I have done many searches on this site on arrays and sorting, and I get the feeling that there is a method for achieving my desired results in a faster, more concise manner. Can anybody help me?

Thanks,
Scott

Update: merlyn and Fletch kindly pointed out that this is in the FAQ. Zaxo offered a solution that worked extremely well for me (since I had already eliminated dupes in my arrays). Thanks for the help once again, monks! :)

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