This detailed tutorial shows how to implement pure functions in JavaScript that are deterministic and referentially transparent, and create no side effects.

Master JavaScript programming with this complete beginner’s tutorial. Learn the fundamentals of JavaScript, a versatile programming language.

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JavaScript is a scripting language that can run in web browsers and other environments. It can be used to create dynamic and interactive web pages, as well as other applications. In this tutorial, we ...

‘Higher-order functions’ is a fancy term for functions that take other functions as arguments or that return functions. Very powerful!