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  1. #!/usr/bin/perl
  2. use warnings;
  3. use feature 'say';
  4.  
  5. $s = "1x2 22x10 1x23 23x23  300x200 300x100 300x400";
  6. my @matches;
  7. while ($s =~ /\b(\d+)x(\d+)\b(?(?{$1 >= $2})(*FAIL))/g) {
  8.   push(@matches, $&);
  9. }
  10. say "@matches";
  11.  
Success #stdin #stdout 0.01s 5500KB
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Standard input is empty
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1x2 1x23 300x400
https://ideone.com/sXDhvY
language:
Perl (perl 5.28.1)
created:
4 years ago
visibility:
secret

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