Re: Need RegExp help - doing an AND match

[imp]

Here's one way to do it with regex:

use strict;
use warnings;
my $re = qr{
    ^
    (?=.*foo)
    (?=.*bar)
}x;

while (my $line = <DATA>) {
  print $line if $line =~ $re;
}


__DATA__
foo
bar
foo bar
bar foo
abc foo bar

[Anonymous Monk]

Oh, hang on a second, there was a valid reason why I wanted RegExp, actually, I forgot.

grep will still search the whole array @words, right?

My original code terminates as soon as it fails to match one word in the array which is what I wanted as the file is huge.
Ok, it's not the best code at all, but it doesn't have to search the entire array every time.

I haven't benchmarked to check yet, but I guess grep might take longer.

I was hoping for a RegExp that stopped its search on a mismatch so I think your second solution might be faster, I will check.

Thanks!

[lidden]

The List::Util module has a first function which may be what you want here instead of grep.