June 2002
Beginner
759 pages
80h 42m
English
keys
keys %hash
Returns a list consisting of all the keys of the
named hash. The keys are returned in an apparently random order,
but it is the same order that either the values or each function produces (assuming that
the hash has not been modified between calls).
In scalar context, keys
returns the number of elements of the hash (and resets the
each iterator).
keys can be used as an
lvalue to increase the number of hash buckets allocated for the
hash:
keys %hash = 200;