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Re^2: Use method/function signatures with Perl

by dragonchild (Archbishop)
on Dec 06, 2004 at 17:10 UTC ( #412700=note: print w/ replies, xml ) Need Help??


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
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'}; }

    is equivalent to my earlier code.

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

      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 } );

      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.

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