Your code won't work as expected, because of low precedence of unless . Either use parentheses or a ternary operator.

Better have a look at Re^2: define a hash-value, using hash-ref and a list of keys if Perl < 5.10 is an issue.

{} is an anonymous hash (-ref).

Cheers Rolf

(addicted to the Perl Programming Language and ☆☆☆☆ :)

In reply to Re^5: define a hash-value, using hash-ref and a list of keys by LanX
in thread define a hash-value, using hash-ref and a list of keys by janssene

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