What is a closure in computer science?

Q: What is a closure in computer science?


A: A closure is a function that has an environment of its own.

Q: What does the environment of a closure contain?


A: The environment of a closure contains at least one bound variable.

Q: Who gave the idea of closure its name?


A: Peter J. Landin gave the idea of closure its name in 1964.

Q: Which programming language made closures popular after 1975?


A: The Scheme programming language made closures popular after 1975.

Q: Are anonymous functions and closures the same thing?


A: Anonymous functions are sometimes wrongly called closures, but not all anonymous functions are closures.

Q: What makes an anonymous function a closure?


A: An anonymous function is a closure if it has an environment of its own with at least one bound variable.

Q: Is a named closure anonymous?


A: No, a named closure is not anonymous.

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