Скачать с ютуб Functional JavaScript for Beginners 10 - Reduce in Practice: Converting Arrays into Objects by Id в хорошем качестве

Functional JavaScript for Beginners 10 - Reduce in Practice: Converting Arrays into Objects by Id

Reducing (or Folding) is a process of recombining an input array into a single value by applying a function to each element of that array. The reduce function is one of the most interesting functions in programming. This doesn't only apply to JavaScript, but is general and applicable to most of the programming languages. In this episode we will see how to use the reduce function to transform an array of objects into a single objects with entries accessible by id. This way we will improve the access time from the linear (O(n)) to constant time (O(1)). The reduce is the fundamental concept behind transducers: the generalization of the computation over collections. 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! Zaiste Weekly Newsletter: https://bit.ly/zaiste-weekly #functional #javascript #reduce