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Regexp Legibility

by patrickhaller (Initiate)
on Jun 14, 2009 at 05:21 UTC ( #771344=note: print w/replies, xml ) Need Help??

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  1. or download this
    $complex_re = /^($ip) ($host) ($msg)$/ if (
        $ip   = /\d+\.\d+\.\d+\.\d+/,
        $host = /[\-\.\w]+/,
        $msg  = /.*/
    );
    
  2. or download this
    my $complex_re = eval {
        my $ip   = qr/\d+\.\d+\.\d+\.\d+/;
    ...
    
        return /^($ip) ($host) ($msg)$/;
    );
    
  3. or download this
                     Rate    with eval without eval
    with eval    116279/s           --          -5%
    without eval 121951/s           5%           --
    

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[1nickt]: \my %foo = { bar => 1 }; say $foo{bar};
[Corion]: 1nickt: Would be great, especially for naming parameters in @_.
[Corion]: When you pass an arrayref, you get to treat it like a local array. But then, I'm cautious with the experimental features, because just when I thought function signatures were a set thing, there is a proposal to use sub [ $foo, $bar ] { ... } to ...
[Corion]: ... declare the parameters, instead of the more common sub ($foo, $bar) { ... }

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