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 | 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…
JavaScript Map Index: How to Use Index Inside Map
To access the index of the array map() method, use the second argument of the callback function. JavaScript array map() method creates the new array populated with the results of calling the provided function on every item in the calling…
Javascript Map Object: The Complete Guide
Javascript Map object holds key-value pairs and remembers the original insertion order of the keys. JavaScript Map Object Map in JavaScript is a collection of keyed data elements, just like an Object. But the main difference is that the…
Javascript: Find Object in Array
You often get in the scenarios where you have an array of objects, and you need to find some specific object inside this array based on some property of the object. Let's see how to find an object in the array in JavaScript. Javascript:…
JavaScript Array Some Example | Array.prototype.some()
Javascript array some() function tests whether some item in the array passes the test implemented by the provided function. The some() method is the JavaScript extension to the ECMA-262 standard; as such, it may not be present in other…
JavaScript Array Contains: The Complete Guide
There is no inbuilt array contains() function in JavaScript. To check if an array contains the specific item, use array includes() function. JavaScript Array Contains To check if JavaScript array contains the item or not, use array…
Javascript: Remove First Element from Array
Removing items from an array is a standard programming paradigm that developers often run into. There are several ways to remove the first element from an array. Use array.shift() method Use array.splice() method Remove First…
