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Javascript
JavaScript, often abbreviated as JS, is a high-level, just-in-time compiled, object-oriented programming language that uses the ECMAScript specification.
JavaScript has curly-bracket syntax, dynamic typing, prototype-based object-orientation, and first-class functions.
Objects, Arrays, and Strings are the main data structures of Javascript.
Javascript Null Check: How to Check Null using Object.is()
To check what is the data type of variable in JavaScript, use the typeof operator. The typeof is a unary operator returns a string indicating the type of the unevaluated operand. The null value describes the intended absence of object…
How to Check for Undefined in JavaScript
To compare values in JavaScript, the triple equal sign is the one you're probably familiar with. The triple equals operator checks for strict equality between two values. Both the data type and value you're comparing have to be precisely…
JavaScript 2D Array: Create Two Dimensional Array in JavaScript
JavaScript does not provide the multi-dimensional array natively or provide any method to define the 2D array. However, you can create a multi-dimensional array by defining the array of items, where each item is also another array.…
How to Remove Character from String in JavaScript
A standard form of string manipulation in JavaScript is to remove the character from the string. So let’s explore all of the ways we can remove the character from a string in JavaScript.Remove character from String in JavaScript.
To…
JavaScript: Remove Object From Array
JavaScript arrays allow you to add and remove array items in different ways. Unfortunately, there is not a simple array.remove() function. So, how do you remove an element from the JavaScript array? Instead of the delete method, the…
JavaScript Wait: How to Make Function Wait in JavaScript
JavaScript does not provide any native functions like wait(). When it comes to JavaScript Timing Events, there are the following functions that you can use in your project.setTimeout()
clearInterval()
setInterval()Many…
JavaScript Sleep: How to Make your Functions Sleep
JavaScript does not have an inbuilt/native sleep function, but thanks to the introduction of promises (and async/await in ES2018), we can implement such features in an evident and precise way, to make your functions sleep.JavaScript…
JavaScript Filter Object: How to Filter Objects in Array
If you have the array of objects and you have to filter out the objects then use the filter() method that accepts a test function, and you need to write that test method in such a way that, it will filter out the unnecessary objects and…
Javascript Promise then: How to Use Promise.prototype.then()
JavaScript Promise then() is an inbuilt function that returns a Promise. The then() method takes up to two arguments: callback functions for the success and failure cases of the Promise. Promises in JavaScript are an object representation…
Javascript Map Reduce: How to Use map() with reduce()
JavaScript map(), reduce(), and filter() are pure functions that return a new array and does not modify the original array. These functions are array methods. Each one will iterate over the array and perform some kind of transformation or…
Javascript Map forEach() Method with Example
The forEach() is an inbuilt JavaScript function that executes a provided function once per every key/value pair in the Map object, in insertion order.JavaScript Map forEach
The JavaScript map forEach() method executes the specified…
