http://www.perlmonks.org?node_id=412700


in reply to Re: Use method/function signatures with Perl
in thread Use method/function signatures with Perl

What's wrong with how Params::Validate does things?

Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.

  • Comment on Re^2: Use method/function signatures with Perl

Replies are listed 'Best First'.
Re^3: Use method/function signatures with Perl
by radiantmatrix (Parson) on Dec 06, 2004 at 17:28 UTC

    Aha. I knew someone must have had the same general idea before! Thank you for that link. I only have a tiny gripe with it vs. my ideal verifier, which is that Params::Validate only validates, where as what I wrote above would imply validation and returning of the validated parameters (rolling two operations into one).

    I'm certainly not about to reinvent a wheel over something so minor, though. The module you recommended will work nicely. Thanks again!

    Update: this is what I get for merely scanning the POD before posting. As xdg points out, Params::Validate does everything I have wished for: 

    use Params::Validate;

sub foobar {
    my ($foo, $bar) = validate_pos ( @_, {type = SCALAR, regex=>/.+/},
                                         {type = HASH_REF} );
    
    print "Using $foo:\n";
    return $foo unless %$bar;
    for (keys %$bar) { print "$_ => $$bar{$_}\n" }
    return $$bar{'result'};
}

    [download]

    is equivalent to my earlier code.

    radiantmatrix
    require General::Disclaimer;
    s//2fde04abe76c036c9074586c1/; while(m/(.)/g){print substr(' ,JPacehklnorstu',hex($1),1)}

[reply]
[d/l]

      I think if you read the POD closely, you'll see Params::Validate does what you want. E.g. (from the POD, 

      my @p = validate( @_, 1, { default => 99 } );

      [download]

      You can also set a global on_fail callback to die however you want.

      -xdg

      Code posted by xdg on PerlMonks is public domain. It has no warranties, express or implied. Posted code may not have been tested. Use at your own risk.

[reply]
[d/l]
[select]

In Section Meditations