Perl Programming - Regular Expressions

Perl Programming
Regular Expressions
Group subpatterns `()` group a subpattern Match repetitions `\1, \2` refer to the first and second groups my $string = "Did the fox jump over the dogs?"; print "1: $string\n" if $string =~ m/(fox){2}/; # "foxfox" print "2: $string\n" if $string =~ m/(the\s).*\1/; # matches
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Group subpatterns

() group a subpattern

Match repetitions

\1, \2 refer to the first and second groups

        my $string = "Did the fox jump over the dogs?";
        print "1: $string\n" if $string =~ m/(fox){2}/;     # "foxfox"
        print "2: $string\n" if $string =~ m/(the\s).*\1/;  # matches