undefing a hash

[Jim]

Hello,

when i undef a anonymous hash that contains other anonymous hashes and areas, e.g.

$hashref = { a => 'a', b => { c => 'c' } };
undef $hashref;

will the undef also undef all data structures inside the tree of data?

much thanks,
Jim

 

[Ga Mu]

Hello,

when i undef a anonymous hash that contains other anonymous hashes and areas, e.g.

$hashref = { a => 'a', b => { c => 'c' } };
undef $hashref;

will the undef also undef all data structures inside the tree of data?

much thanks,
Jim

$hashref is a scalar that has nothing to do with anything you're doing.
When referring to the entire hash, as in both lines above, you need to
use %hashref. Yes, the entire hash is undef'd.

Greg