Reference: tie
Author: Ellen Siever, Stephen Spainhour & Nathan Patwardhan
Date: 1999-07-02T01:38:52Z

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| Chapter 5 Function Reference |

## tie

    tie variable, classname, list

Binds a variable to a package class, classname, that will provide the implementation for the variable. Any additional arguments (list) are passed to the "new" method of the class (meaning `TIESCALAR`, `TIEARRAY`, or `TIEHASH`). Typically these are arguments such as might be passed to the `dbm_open(3)` function of C, but this is package-dependent. The object returned by the "new" method is also returned by the `tie` function, which can be useful if you want to access other methods in classname. (The object can also be accessed through the `tied` function.)

A class implementing a hash should provide the following methods:

>     TIEHASH $class, LIST
>     DESTROY $self
>     FETCH $self, $key
>     STORE $self, $key, $value
>     DELETE $self, $key
>     EXISTS $self, $key
>     FIRSTKEY $self
>     NEXTKEY $self, $lastkey

A class implementing an ordinary array should provide the following methods:

>     TIEARRAY $classname, LIST
>     DESTROY $self
>     FETCH $self, $subscript
>     STORE $self, $subscript, $value

A class implementing a scalar should provide the following methods:

>     TIESCALAR $classname, LIST
>     DESTROY $self
>     FETCH $self,
>     STORE $self, $value

Unlike `dbmopen`, the `tie` function will not `use` or `require` a module for you - you need to do that explicitly yourself.

Reference: telldir |  | Reference: tied