Matching Modifiers : modifier « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. modifier

Matching Modifiers

    

#Modifier    Meaning
#i           Turn off case sensitivity.
#m           Treat a string as multiple lines.
#o           Compile pattern only once.
#s           Treat string as a single line when a newline is embedded.
#x           Permit comments in a regular expression and ignore whitespace.
#g           Match globally; i.e., find all occurrences. 

while(<DATA>){
      print if /B/;     # Print the line if it matches B
}
__DATA__
    S
    B
    I
    N
    J
    K








Related examples in the same category

1.The e Modifier Evaluating an Expression
2.The e modifier
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 Modifier-The Dot Metacharacter and the Newline
7.The s Operator and Substitution
8.The s operator supports a number of variables
9.The x Modifier: The Expressive Modifier
10.The i Modifier Case Insensitivity
11.\B matches only if the pattern is contained in a word.
12.The \s metasymbol and whitespace
13.ei modifier
14.Use /gc to remember position
15.Use \G to match rest of text
16.The \S metasymbol and nonwhitespace
17.Inline Modifiers