Perl in a Nutshell

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Function Reference
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tied

tied variable

Returns a reference to the object underlying variable (the same value that was originally returned by the tie call which bound the variable to a package). It returns the undefined value if variable isn't tied to a package. So, for example, you can use:

ref tied %hash
to find out which package your hash is currently tied to.


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Reference: tieBook IndexReference: time