Which are shown table table shows the regular expression functions

Chapter 4: Using Simple Functions 111

Metacharacters	Meaning
		anatom(y\|ies) matches anatomy and
	the specified pattern. You use	anatomies.




	matches, known as captures,
	from this type of subexpression.
	Matches x or y, where x and y
[abc]


	characters.	[a-c]bc matches abc, bbc, and cbc.
		[a-c]bc matches abc, bbc, and cbc.
		[:alphanum:] matches alphanumeric
	Specifies a character class and	[:alphanum:] matches alphanumeric
	matches any character in that	characters 0–9, A–Z, and a–z.



		[:digit:] matches digits 0–9.
		[:graph:] matches non-blank




		except [:print:] includes the space
		character.
	Matches one collation element,	character.




		[:upper:] matches all uppercase
		alphabetic characters A–Z.




[==]	like a multicharacter element.
	like a multicharacter element.

Metacharacters	Meaning	Examples
		(.)\1 matches two consecutive identical

	positive integer.	character except null, and the \1
		repeats the capture, matching the same
		character again, therefore matching two

Metacharacters \d \D \w \W \s \S \A \Z *?

TABLE 4-6Perl-Influenced Metacharacters

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