The s Modifier-The Dot Metacharacter and the Newline : modifier « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. modifier

The s Modifier-The Dot Metacharacter and the Newline

    

# The s modifier can be used with both the m (match) and the s (substitution) operators.

# The s modifier and the newline
$_="this is a test\nAnother test.\n";
print $& if /is./s;
print $& if /a\../s;
print if s/testA/test, a/s;








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3.The g Modifier Global Substitution
4.The m Operator and Matching
5.The m modifier controls the behavior of the $ and ^ anchor metacharacters.
6.The s Operator and Substitution
7.The s operator supports a number of variables
8.The x Modifier: The Expressive Modifier
9.The i Modifier Case Insensitivity
10.\B matches only if the pattern is contained in a word.
11.The \s metasymbol and whitespace
12.ei modifier
13.Use /gc to remember position
14.Use \G to match rest of text
15.The \S metasymbol and nonwhitespace
16.Matching Modifiers
17.Inline Modifiers