Closures

Internal

• Functional Programming
• Java 8 Lambda Expressions
• Go Closures

Overview

A closure is an instance of a function that can reference non-local variables of that function with no restrictions. This is where the name comes from, a closure closes around the data accessible in the lexical scope the function is is declared. The closure can access the data when it executes. Go closures behave this way. Java 8 lambda expression are different, in that they can only refer final local variables in the scope in which the lambda was declared.