http://qs1969.pair.com?node_id=204250


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

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 :)

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Re: Re: Problem with Tie::RegexpHash
by sch (Pilgrim) on Oct 10, 2002 at 18:43 UTC

    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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