functional light javascript

Let's pretend to do a task now: write JavaScript code as much as possible in the principle of functional language. The next series of articles is to get you and me to embark on such a journey. First, we need to correct some of the concepts of functional language errors that may exist in your mind. The function type in the JS language is seriously misunderstood.

map functions are abstracted for the second time, A higher level can be understood as an abstract level.Functional Programming in JavaScript JavaScript is a widely misunderstood language. Because it was full of a lot of copy-paste code in early Web development, the quality of JavaScript code is usually not high, in addition,

JavaScript functional programming This article records some of the things I have learned in functional learning, deepen my memory and record it, so that I can easily review it later. I recently saw the book JavaScript functional programming, which was finalized at the time o

Chapter 1th Introduction to JavaScript Functional programming 11.1 JavaScript Case 11.2 Starting Functional Programming 41.2.1 Why functional programming is important 41.2.2 The function as an abstract unit 71.2.3 Package and Hide 91.2.4 function as a unit of behavior 101.2.

Local or local applications are functional techniques that may sound confusing to those familiar with the way traditional JavaScript code is written, but it does make your JavaScript code more readable if applied properly.Greater readability, greater flexibility One of the advantages of functional

Sometimes, an elegant implementation is a function. Not a method. Not a class. is not a frame. Just functions. -John Carmack, chief programmer of the Game "Doom" Functional programming is all about how to break a problem into a series of functions. In general, functions are chained together, nested, and transmitted back and forth, and are considered first class citizens. If you've ever used a framework such as jquery or n

objects.In functional programming, curry is equivalent to the output function of the factory, we can easily set up a condition to return the function of other functions, that is, the function factory. Let's take a look at the following example, assuming that there is a common function that adds two numbers, which, after curry processing, we can create an increment function that adds one to its parameters.const adder = (x, y) => {x + y}const1)Enjoy me

environment that operates DOM elements. You may be a fan of jquery and think this function operation is awesome. However, this is not a reason to completely use this programming mode everywhere. The following jquery source code is used as an example: 12345678 jQuery.fn = jQuery.prototype = { init: function( selector, context ) { ... }, size: function() { return this.length; }, each: function( callback, args ) { return jQuery.each( this, callback, args ); },

efficiently.You might want to know if a purely function is allowed to produce an immutable return value by altering some local data. The answer is yes.Very few data types in JavaScript are immutable by default. String is an example of a data type that cannot be changed:var s = "HelloWorld";S.touppercase ();= "HELLOWORLD" s; = "HelloWorld"The benefits of a non-changing state• Avoid confusion and increase program accuracy: In complex systems, most inco

This article records people in the learning function to understand some things, deepen the memory and record down, convenient review. In the recent see "JavaScript function Programming" This book when the pre-sale was set down. The main purpose is for individuals to currently or not understand what is functional programming. In the course of their own learning has been heard around people say process-orien

Introduction Do you know that JavaScript is actually a functional programming language? This guide will teach you how to use the functional features of JavaScript. Requirements:You should have a basic understanding of JavaScript and DOM. The purpose of writing this guide is

Everyone is talking about the amazing new features that workflows supports in ECMASCRIPT6, so it's easy to forget that ECMAScript5 gives us some great tools to support functional programming in JavaScript, These tool methods we can now use. In these function methods, the map () method and the reduce () method are mainly based on the JavaScript array object.If you

Analysis of javascript functional programming examples This article mainly introduces javascript functional programming. The example analyzes the usage skills related to javascript functional programming, which is very useful. For

Do you know that JavaScript is actually a functional programming language? This guide will teach you how to use the functional features of JavaScript. Requirements:You should have a basic understanding of JavaScript and DOM. The purpose of writing this guide is because there

Objective:The previous article introduced function callbacks, Higher-order functions, and function currying, as well as advanced function applications, and because we are learning JavaScript functional programming, want to tidy up functional programming, for our daily more useful parts.Why is functional programming imp

would build a house and then build the house like this. Method Object.creat () as an alternative to the new operator, uses it to create JavaScript objects, adding a more prototype-like feel. function Mymammal = { name: ' Herb ' mammal ', get_name:function () {return this.name; }, says:f Unction () {return this.saying | | ''; } } var mycat = object.create (mymammal); Mycat.name = ' Henrietta '; mycat.saying = ' Meow '; Myca

= Myarray.map (function (x) {return x*2}); Console.log (myarray); Output: [1,2,3,4] console.log (NewArray);//output: [2,4,6,8] Also, they only work on arrays and cannot be used for other data structures that can be iterated, such as objects. Don't worry, there are a lot of libraries like underscore.js,lazy.js,stream.js and so on that have implemented their own more powerful maps (), filter () and reduce (). Callback If you've never used a callback before, the concept may be confusing to

var f = function fact (x) {if (x else return x*fact (x-1);}; The 2.Function () constructor allows run-time JavaScript code to be dynamically created and compiled. In this way it resembles the global function eval ().The 3.Function () constructor resolves the body of the function every time it executes and creates a new function object. Therefore, it is very inefficient to call function () constructors in a loop or in frequently

, artificial written in front, this is to avoid the compression of the merger, resulting in a variety of unexpected results.If it's not a generic method, I'm used to declaring it in variable style, which is, of course, a personal habit. For a functional declaration, it is visible throughout the scope, and some of the books say that it is a declaration of ascension, or a declaration in advance. In fact, what is called unimportant, understand what happe

The examples in this article describe JavaScript-functional programming. Share to everyone for your reference. The specific analysis is as follows: JS, like other dynamic languages, can write higher-order functions, and so-called higher-order functions are functions that can manipulate functions. Because in JS the function is a thorough object, belonging to the first class of citizens, which provides a pre