Re: Usage of ref for testing if a passed in reference is a HASH, etc

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On Fri, Nov 12, 2004 at 13:51:23 -0500, Michael Henson wrote:
> Many places in Class::DBI use ref to determine if a given value is a
> reference to an array or a hash. Wouldn't it be better to use
> UNIVERSAL::isa, esp if the only purpose is to make sure that accessing a
> key makes sense?

What's the difference?

Personally I prefer Scalar::Util's reftype, just because it's easier
to figure out what the programmer was testing for without actually
reading into the line of code.

If you mean testing whether a /blessed/ reference is of the correct
class, not that a reference is to the correct data type, then
nonononononono!!! UNIVERSAL::isa is crummy. Called that way, that
is. ->isa is a method. Scalar::Util::blessed($thing) &&
$thing->isa('class') is the way to go.

--=20
 ()  Yuval Kogman <nothingmuch@xxxxxxxx.xxx> 0xEBD27418  perl hacker &
 /\  kung foo master: /me dodges cabbages like macalypse log N: neeyah!


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