Re: How to differentiate hash reference and object reference?

From perlfunc:

ref EXPR
ref

Returns a true value if EXPR is a reference, false otherwise. If EXPR is not specified, $_ will be used. The value returned depends on the type of thing the reference is a reference to. Builtin types include:

SCALAR
ARRAY
HASH
CODE
REF
GLOB
LVALUE

If the referenced object has been blessed into a package, then that package name is returned instead. You can think of ref as a typeof operator.

So, there's no need to call ->isa():

sub wants_foo_object 
{
    my $obj = shift;
    die unless $obj && ref($obj) eq "foo";
    #...
}
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(untested)

holli, /regexed monk/

Comment on Re: How to differentiate hash reference and object reference? Download Code

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Re^2: How to differentiate hash reference and object reference? by phaylon (Curate) on Aug 31, 2005 at 12:51 UTC
But ->isa return's true if the argument is in the package's @ISA array. ref( $obj ) does something different. I think UNIVERSAL may be more the way to go. Ordinary morality is for ordinary people. -- Aleister Crowley	[reply]
Re^3: How to differentiate hash reference and object reference? by chromatic (Archbishop) on Aug 31, 2005 at 17:21 UTC
No, `isa()` returns true if whatever method `isa()` is for the invocant it returns true. If I wrote an object and overrode `isa()` to return true based on a the phase of the moon, that's what it would do. That's probably unwise code to write, but the purpose of having `isa()` be a method is so that classes can override it when it makes sense to do so.	[reply] [d/l] [select]
Re^4: How to differentiate hash reference and object reference? by phaylon (Curate) on Aug 31, 2005 at 20:08 UTC
Yes, but I was more on to what the OP wanted to achieve with it. Therefore the suggestion of UNIVERSAL::isa. Ordinary morality is for ordinary people. -- Aleister Crowley	[reply]