print do { (my $t = $_ ) =~ s/foo/bar/g };

[download]

Update: Ah, missed the without temp variables qualifier. You could use the similar do { local($_)=$_; s/foo/bar/g }, which uses the block's stack rather than an explicit temporary.

In reply to Re: Non-destructive string substitution by Fletch
in thread Non-destructive string substitution by Sprad

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