JavaScript interview questions with code examples

JavaScript interview questions with code examples closure in JavaScript What is closure in JavaScript and how can it be used to create private variables? A closure is a function that has access to variables in its outer scope, even after the outer function has returned. Closures can be used to create private variables in JavaScript … Read more

JavaScript Use Destructuring to get values from arrays and objects

https://www.linkedin.com/pulse/javascript-use-destructuring-get-values-from-arrays-objects-svekis- Destructuring is a feature in JavaScript Use Destructuring to get values from arrays Make use of destructuring to extract values from arrays and objects into variables: // Destructuring arrays const colors = [‘red’, ‘green’, ‘blue’]; const [first, second, third] = colors; // Destructuring objects const person = {   name: ‘John Doe’,   age: 30,   job: … Read more

Use forEach over for loop

Use forEach over for loop Prefer forEach over for loop for simple iterations: const numbers = [1, 2, 3, 4, 5]; numbers.forEach(number => console.log(number)); The forEach method is called on the numbers array. The first argument to forEach is a callback function, which is executed for each element in the array. The callback function takes … Read more

Coding Examples from YouTube Videos Learn JavaScript PDF Guide Free sample code

Coding Examples from YouTube Videos Learn JavaScript strict mode example Use strict mode to enforce modern JavaScript syntax and catch errors early: ‘use strict’; “use strict” is a directive in JavaScript that enables “strict mode”. Strict mode is a way to opt in to a “secure” version of JavaScript. When in strict mode, JavaScript will … Read more

use of higher-order functions 

use of higher-order functions  Make use of higher-order functions like map, filter, and reduce to process arrays: const numbers = [1, 2, 3, 4, 5]; // Use map const double = numbers.map(number => number * 2); // Use filter const even = numbers.filter(number => number % 2 === 0); // Use reduce const sum = … Read more

Sample Code JavaScript Coding Examples and Lessons Download PDF Guide FREE

strict mode example Use strict mode to enforce modern JavaScript syntax and catch errors early: ‘use strict’; “use strict” is a directive in JavaScript that enables “strict mode”. Strict mode is a way to opt in to a “secure” version of JavaScript. When in strict mode, JavaScript will validate your code more strictly and throw … Read more

JavaScript Tips and code explained Use const and let

Use const and let Always declare variables with const or let, rather than var: // Use let let name = ‘John Doe’; // Use const const PI = 3.14; var, let, and const are used to declare variables. var is the oldest way to declare variables in JavaScript and has function scope. This means that … Read more

JavaScript Arrow Functions Fat Arrow

Use Arrows functions Use arrow functions instead of function for cleaner and concise code: // Function expression const multiply = (a, b) => a * b; // Implicit return const square = x => x * x; Arrow functions, also known as “fat arrow” functions, are a shorthand way to declare anonymous functions in JavaScript. … Read more

Use Strict in JavaScript Explained with source code

strict mode example Use strict mode to enforce modern JavaScript syntax and catch errors early: ‘use strict’; “use strict” is a directive in JavaScript that enables “strict mode”. Strict mode is a way to opt in to a “secure” version of JavaScript. When in strict mode, JavaScript will validate your code more strictly and throw … Read more

Free PDF Guides HTML CSS JavaScript top tips for 2023

HTML (Hypertext Markup Language) is the standard language used to create web pages. It is a markup language, which means that it uses tags to describe the structure and content of a web page. HTML tags define the headings, paragraphs, lists, links, images, and other elements of a web page. CSS (Cascading Style Sheets) is … Read more