Thanks for reading this. I'm having difficulty with a simple substitution that I want to occur only once. I've RTFM'd (Cookbook) but can't find the exact solution.

Let's see what silly things I've done.(The following code is stripped down for time/space convenience)

#!/usr/bin/perl -Tw

    use strict;

    $result = "43 P"; #comes from somewhere else in the program
    interpret_clock($result);


     sub interpret_clock {

     $_[0] =~ s/43 F/Tunnel 1\/2 Hr FT/o;
     $_[0] =~ s/43 P/Tunnel 1\/2 Hr PT/o;
     $_[0] =~ s/45 F/Tunnel No Lunch FT/o;
     $_[0] =~ s/45 P/Tunnel No Lunch PT/o;
     $_[0] =~ s/F/Full Time No Clock/o;
     $_[0] =~ s/O/On Call No Clock/o;
     $_[0] =~ s/P/Part Time No Clock/o;
     $_[0] =~ s/T/Temporary No Clock/o;

     }
 print $result;

[download]
I'd like it to print 'Tunnel 1/2 HR PT'. But what I get is 'Part Time No Clockunnel 1/2 HR PPart Time No Clock'. The substitutions for the single letters matches also. I'd only want them to match exactly on single letter values. I've tried using the match exact {1} but I couldn't get it to work.

Any ideas? Any direction someone could point me to?

peppiv

In reply to Regex Substitution in sub by peppiv

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