Pattern-Matching Operators(The syntax used to perform a pattern match on a string) : Pattern matching « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. Pattern matching

Pattern-Matching Operators(The syntax used to perform a pattern match on a string)

    

# The syntax used to perform a pattern match on a string is $string =~ /regular expression/expression modifier (optional)   

    
    #!/usr/local/bin/perl -w    
        
    while (<STDIN>)     
    {   
       print if ($_ =~ /the/);  
    }








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15.Regular expression: start a string with period
16.Reversing subpatterns
17.Repeating patterns
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19.Check for 4-8 a's
20.Check for a or b
21.Check for and remove a trailing backslash character
22.Check for leading alpha character, rest alphanumeric
23.Check for no 'a'
24.Check for white space
25.A program that illustrates the use of the matching operator.
26./d.f/ matches d, followed by any non-newline character, followed by f
27./de{1,3}f/ matches d, followed by one, two, or three occurrences of e, followed by f.
28.Print line unless it matches E
29.Count the match times