Perl

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Recipes

Inline-Editing Anywhere

You may be aware that Perl allows in-line editing of files via the -i switch. While this option is global for the script, it can be convenient to switch it on selectively. Here is a code snippet from one of Randal Schwartz's columns: 
{                                                                                                               
  local @ARGV = "lib/Acme/Current.pm";                                                                          
  local $^I = "~";                                                                                              
  while (<>) {                                                                                                  
    s/\$YEAR = \d+, \$MONTH = \d+, \$DAY = \d+;/\$YEAR = $Y, \$MONTH = $M, \$DAY = $D;/;                        
    print;                                                                                                      
  }                                                                                                             
}

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Revision 16 Apr 2004
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