|Perl Language Reference Manual|
by Larry Wall and others
Paperback (6"x9"), 724 pages
RRP £29.95 ($39.95)
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/[[:digit:]]/ # Matches a character that is a digit. /[01[:lower:]]/ # Matches a character that is either a # lowercase letter, or '0' or '1'. /[[:digit:][:^xdigit:]]/ # Matches a character that can be anything # except the letters 'a' to 'f'. This is # because the main character class is composed # of two POSIX character classes that are ORed # together, one that matches any digit, and # the other that matches anything that isn't a # hex digit. The result matches all # characters except the letters 'a' to 'f' and # 'A' to 'F'.
|ISBN 9781906966027||Perl Language Reference Manual||See the print edition|