openSUSE Linux Unleashed

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Michael McCallister

"openSUSE Linux Unleashed"

CHAPTER 30 Using Perl and Python 616
TABLE 30.4 Some Perl Metacharacters
Meaning Metacharacter
Match any single character (except a newline). .
Match the preceding character(s), any number of times. *
Match the preceding character(s), one or more times. +
The preceding character(s) may not be in the string, but ?
it will still match if the other requirements are present.
Boolean OR statement. |
Text matches if a tab character is present. \t
Pattern matches if it is at the beginning of a line. ^
Pattern matches if it is at the end of a line. $
Match a letter, number, or underscore. \w
Match a number. \d
Match any whitespace character such as a space, \s
tab, or newline.
Escape any metacharacter into an ordinary character. \
In addition to searching and matching text segments and character patterns, regular
expressions can also be used to validate user input. The form of expected input is
expressed as a regular expression against which the input is compared.
my $email = ;
print ???Input is in valid format??? if
$email =~ \[A-Za-z0-9.

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The Mariner of St. Malo : A chronicle of the voyages of Jacques Cartier (page 51) Lover's Diary, A, Complete (page 34) The Countess of Escarbagnas (page 7)

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Michael McCallister

"openSUSE Linux Unleashed"