Mapping is a process of transforming an input array by applying a function to each element of that array and producing a new array that contains results of that function invocation. In JavaScript, the map() is a higher-order function defined as a method on the Array object that applies a given function to each element in the calling array.
Functional programming is a programming paradigm in which you build programs by composing functions. The computation is then the evaluation of those functions. Functional programming focuses on the usage of pure functions and on avoiding shared, mutable state. This programming paradigm is declarative. Functional code is usually more concise and easier to test.
In this mini series, we will embark on an exciting journey to learn a bit about functional programming by using JavaScript. Presented concepts will be mostly universal and applicable to other programming languages. This series is created with beginners and non-programmers in mind; don't worry, we will take it slowly!
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