| PerlFAQ Server 2007-02-23, 7:07 pm |
| This is an excerpt from the latest version perlfaq4.pod, which
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4.58: How can I know how many entries are in a hash?
If you mean how many keys, then all you have to do is use the keys()
function in a scalar context:
$num_keys = keys %hash;
The keys() function also resets the iterator, which means that you may
see strange results if you use this between uses of other hash operators
such as each().
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