One Pager Cheat Sheet

• JavaScript allows for the implementation of functional programming, combining object-oriented, functional and procedural programming paradigms.
• Functional programming is a programming paradigm which uses a declarative rather than an imperative style, allowing for concise instruction and improved readability.
• The three main programming paradigms are Object-oriented, Procedural and Functional, each of which have different approaches to programming computers, such as data representation with classes and objects for Object-oriented programming and declarative programming for Functional programming.
• Apure functionis a type of function which always returns the same output when given the same input, regardless of the number of times it has been called.
• False, referential transparency applies to pure functions, which can be easily tested, reused and have no side effects.
• Referential Transparency is the ability to replace a function with its return value without changing its meaning.
• No functions with side effects are considered pure; therefore this is an impure function.
• Higher-order functions promote reusability and allow us to isolate actions and perform function composition, among other uses, such as the example of filter() shown in the article.
• Be curious and practice - it's easy to understand, grow and maintain Functional Programs - Happy Coding!
• The length() function is the odd one out, as it is not related to functional programming like the other terms.