- , => {3,7} repeat in range
- list ops () capture REGEX CHARCLASSES
- not (?:) no capture . == [^\n]
- and [] character class \s == [\x20\f\t\r\n]
- or xor | alternation \w == [A-Za-z0-9_]
- \b word boundary \d == [0-9]
- \z string end \S, \W and \D negate
- DO
- use strict; DON'T LINKS
- use warnings; "$foo" perl.com
- my $var; $$variable_name perlmonks.org
+ , => {3,7} repeat in range /o cmpl pat. once
+ list ops () capture
+ not (?:) no capture REGEX CHARCLASSES
+ and [] character class . == [^\n]
+ or xor | alternation \s == whitespace
+ \b word boundary \w == word characters
+ \z string end \d == digits
+ DO \S, \W and \D negate
+ use strict; DON'T
+ use warnings; "$foo" LINKS
+ my $var; $$variable_name perl.com