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How do I test if a 'thing' is a hash (or array or scalar)?

by Anonymous Monk
on Sep 12, 2000 at 20:51 UTC ( #32129=categorized question: print w/replies, xml ) Need Help??
Contributed by Anonymous Monk on Sep 12, 2000 at 20:51 UTC
Q&A  > hashes

Answer: How do I test if a 'thing' is a hash (or array or scalar)?
contributed by tye

But ref() won't tell you whether a blessed reference is a reference to a scalar, array, hash, or other. A better approach is:

UNIVERSAL::isa( $ref, "HASH" )
        - tye (but my friends call me "Tye")

Q&A Editor comment: See Library entry: perlman:lib:UNIVERSAL

Answer: How do I test if a
contributed by merlyn

If you have it in $foo, it's a scalar. It can't be an array or a hash, because Perl is strongly typed.

If you meant "how do I test whether a reference to {something} is a reference to a scalar/array/hash?", then look at the ref function.

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