anonymous

Documentation

Overview

anonymous demonstrates anonymous functions in Go

• Named functions can be written in Go at the package level only
• In addition, Go supports function literals that can be written even inside another function.
• A function literal is written like a normal function declaration, but without function name.
• It is considered as Go expression and its value is called anonymous function.

Why anonymous functions?

• Allows to define function at its point of use
• More importantly, those functions have access to their entire lexical environment
• So, a function value is not just action, but it can also have states.

Closures:

• In programming languages, a closure means binding a function with its environment.
• For example a function referencing a variable outside its body.
• Since Go has closures, anonymous functions can still has references outside variables and the scope of the variable is retained.