Re: Questions about curious idiom seen in package

in reply to Questions about curious idiom seen in package

undef($variable) sets a variable to undef.

undef(my $variable) declares a variable and sets it to undef in the same statement. However, scalar variables default to undef anyway so there's no point in it.

toby döt ink

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Re^2: Questions about curious idiom seen in package by ikegami (Patriarch) on Feb 18, 2019 at 01:08 UTC
More precisely, `$var = undef;` sets a var to undef. `undef $var;` also frees any buffers associated with the variable. This will usually result in a performance penalty.	[reply] [d/l] [select]

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