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my $var = "foobarfoobaz"; $var =~ s/foo//; say $var; # says "barfoobaz"
my $var = "foobarfoobaz"; $var =~ s/foo//g; say $var; # says "barbaz"
my $var = "foobarfoobaz"; $var =~ s@foo@@g; say $var; # says "barbaz"
my $var = "foobarfoobaz"; $var =~ s{foo}{}g; say $var; # says "barbaz"
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