while (s/this/that/g) {
    push @matches, $&;
}

[download]
Better: 
while (s/this/that/gp) {
    push @matches, ${^MATCH};
}

[download]

Update: Thought it was m//g.

In reply to Re: Loop through global substitution by ikegami
in thread Loop through global substitution by alafarm

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