comment on

As haukex already stated, exists is superfluous, as keys can give you existing keys only, to loop over
for this purpose, undef and empty (and zero) are to be handled the same, you can simply test if/unless $birthdays{$name}. See Scalar values in perldata:
A scalar value is interpreted as FALSE in the Boolean sense if it is undefined, the null string or the number 0 (or its string equivalent, "0"), and TRUE if it is anything else. The Boolean context is just a special kind of scalar context where no conversion to a string or a number is ever performed.

(and just as I am composing this, Tux beat me to it :-) too much research and interruptions :-(

In reply to Re: Printing from a hash table by soonix
in thread Printing from a hash table by catfish1116

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