Using Patterns with Substitutions : substitution « Regular Expression « Perl






  1. Perl
  2. Regular Expression
  3. substitution

Using Patterns with Substitutions

    


#The s operator substitutes data that match a pattern with replacement data. 

#$variable =~ s/pattern/substitution/;

#The s operator returns the number of substitutions made or 0 if none occurred.

#!/usr/bin/perl -w

$p = "Jack, Software Engineer";

$p =~ s/Software Engineer/Tester/;

print "New title: $p.\n";








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1.Options for the substitution operator.
2.Replace pattern
3.Replace pattern with ()
4.Substitute I with N and print
5.Substitute N with J
6.Substitute every T with M
7.Substitute first T with an M
8.Substitute first occurrence of "blue" with "red"
9.Substitute tom with Mary
10.Substitution Example
11.Substitution Modifiers
12.Using substitutions to clean up input data.
13.Capitalize all sentences
14.Changing substitution delimiters
15.Increase salary with pattern match
16.Evaluate replacement
17.Alternation: /John|Karen|Steve/ will match a line containing John or Karen or Steve.
18.Options for the S Operator
19.Ignore case, global substitution