Re: How to tell if a variable is blessed ?

To tell you if the contents of the variable are a reference, and if so, the nature of that reference, use the function ref.

ref $var;
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The other alternative is this:

eval { $ref->isa("Some::Package") };
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Regards,
Edward

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Re^2: How to tell if a variable is blessed ? by linux454 (Pilgrim) on Mar 02, 2006 at 15:07 UTC
How about a combination of the two? `if ( ref($var) && $var->isa("Some::Package") ) { $var->someMethod(); }` [download] Or better yet: `my $sub; if ( ref($var) && ($sub = $var->can("someMethod")) ) { $sub->(); } else { die "Method someMethod not found." }` [download] Of course you don't have to capture the return of "can" but it can be convenient.	[reply] [d/l] [select]
Re^2: How to tell if a variable is blessed ? by dragonchild (Archbishop) on Mar 02, 2006 at 15:42 UTC
Better is `eval { local $SIG{__DIE__}; $ref->isa('Some::Package'); }` [download] You might trigger a die handler, which could be bad. For example, one of Test::More's dependencies has one. See eval-blocks and Test::Builder for more on the topic. My criteria for good software: Does it work? Can someone else come in, make a change, and be reasonably certain no bugs were introduced?	[reply] [d/l]