In computer science, a dispatch table is a table of pointers to functions or methods. Use of such a table is a common technique when implementing late binding in object-oriented programming.
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Perl implementation
The following shows one way to implement a dispatch table in Perl, using a hash to store references to code (also known as function pointers).
Running this Perl program as perl greet -h will produce "hello", and running it as perl greet -g will produce "goodbye".
Javascript implementation
Following is a demo of implementing Dispatch table in Javascript:
Virtual method tables
In object-oriented programming languages that support virtual methods, the compiler will automatically create a dispatch table for each object of a class containing virtual methods. This table is called a virtual method table or vtable, and every call to a virtual method is dispatched through the vtable.