Walking on the intersection of research and programming
An array is an ordered collection of values. Each value is called an element, and each element has a numeric position in the array, known as its index. JavaScript arrays are untyped: an array element may be of any type, and different elements of the same array may be of different types. Array elements may … Continue reading JavaScript definite guide – Arrays
Higher Order JavaScript This chapter covers Why JavaScript is a suitable functional language JavaScript as a language that enables multi paradigm development Immutability and policies for change Understanding higher-order and first-class functions Exploring the concepts of closures and scopes Practical sue of closures As applications get bigger, so does their complexity. No matter how good … Continue reading Functional Programming in JavaScript — Higher Order JavaScript
What is functional programming? In simple terms, functional programming is a software development style that places a major emphasis on the use of functions. What better text to print than the good ol “Hello World”: document.querySelector(‘#msg’).innerHTML = ‘<h1>Hello world</h1>’ This program is simple, but because everything is hardcoded, you can’t use it to display messages … Continue reading Functional Programming in JavaScript — Becoming functional
JavaScript's fundamental datatype is the object. An object is a composite value: it aggregates multiple values (primitive values or other objects) and allows you to store and retrieve those values by name. An object is an unordered collection of properties, each of which has a name and a value. Any value in JavaScript that is … Continue reading JavaScript definite guide – Objects
In JavaScript, functions are objects, and they can be manipulated by programs. Javascript can assign functions to variables and pass them to other functions, for example. Since functions are objects, you can set properties on them, and even invoke methods on them. JavaScript function definitions can be nested within other functions, and they have access … Continue reading JavaScript definite guide – Functions
5.6 Summary Array.from creates an array containing all the values from an array-like object Array.of creates an array with supplied values is safer than new Array Array.prototype.includes checks if array contains a value at any of it’s indices Array.prototype.find searches an array based on a criteria function and returns a first value found Array.prototype.fill fills … Continue reading Learn JavaScript Next – New Array Methods
Unit 1: Variables and & Strings Lesson 1. Declaring Variables with let In the history of JavaScript, variables have always been declared using the keyword var. ES6 introduces two new ways to declare variables, with the let and const keywords. Both of these work slightly different than variables with var. There are two primary differences … Continue reading [book note] Manning MEAP: JavaScript Next – Unit 1: Variables & Strings
Unit 2 Objects & Arrays Lesson 5: New Array Methods Arrays are probably the most common data structure used in JavaScript. We use them to hold all kinds of data but sometimes getting the data we want into or out of the array isn’t as easy as it should be. However those tasks just got … Continue reading [book note] Manning MEAP: JavaScript Next – Unit 2: Objects & Arrays
Building Application and Context Menus This chapter covers: Creating menus using Electron’s Menu and MenuItem modules Building menus from a template Defining custom menus for different target operating systems. Assigning common operating system roles to our menu items Making menu items with custom, application-specific functionality Creating custom context menus for different parts of your user … Continue reading [book note] Manning MEAP – Election in Action – Chapter 6
Building a RESTful web service [code lang=”javascript”] // Listing 4.1 RESTful routes example const express = require(‘express’) const app = express() const articles = [{ title: ‘Example’ }] app.get(‘/articles’, (req, res, next) => { res.send(articles) }) app.post(‘/articles’, (req, res, next) => { res.send(‘OK’) }) app.get(‘/articles:id’, (req, res, next) => { const id = req.params.id console.log(‘Fetching:’, … Continue reading Node.js in Action