in reply to Re: Problem with Tie::RegexpHash
in thread Problem with Tie::RegexpHash

Yup, thought of that :) - but then when I have problems later on (as I always do), the first things the monks would say is use -w (well, after use strict).

Looking at the documentation for the module, it says of the add method:

$obj->add( $key, $value );
Adds a new key/value pair to the hash. $key can be a Regexp or a string (which is compiled into a Regexp).
If $key is already defined, the value will be changed. If $key matches an existing key (but is not the same), a warning will be shown if warnings are enabled.

and I suspect that the final paragraph is coming into play, but I can't see why.

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Re: Re: Re: Problem with Tie::RegexpHash
by Mr. Muskrat (Canon) on Oct 10, 2002 at 17:32 UTC
    After having read the docs for Tie::RegexpHash, I still haven't found a solution. I'd say that your best bet would be to contact the author.
[reply]

      Yup, having to do that - was trying to get something working quickly and hoped someone else had come across a solution

      What I'm trying to do is a simple parser for some commands and I was thinking of using a hash with the keys being regexp's that would match commands and the value's being references to functions - if anyone knows of another way of doing it I'm always willing to change direction mid-flow :)

[reply]

        decided to add this as a seperate node

        This is the starting point I've got so far: 

        #!/usr/bin/perl -w

use strict;
use diagnostics;

my %cmds;
my $rgx;
my $sub;

$cmds{qr/^\s*quit/}  = \&quit;
$cmds{qr/^\s*cmd .*/}  = \&cmd;


my $txt = "cmd 12   arg2";


foreach $rgx (keys(%cmds)) {
        if ( $txt =~ /$rgx/i ) {
                $sub = $cmds{$rgx};
                &$sub($txt);
        }
}


exit;


sub quit {
        print "called quit\n";
}

sub cmd {
        my ($cmd, @argx) = split /\s+/, $_[0];

        print "called ".$cmd." with ".$argx[0]." ".$argx[1]."\n";
}

        [download]

        which when called as above returns:

        called cmd with 12 arg2

        and if the line: 
        my $txt = "cmd 12   arg2";

        [download]
        is changed to
        my $txt = "quit";

        [download]
        returns:

        called quit

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