In this tutorial, let’s find out how to extend an existing JavaScript array with another array. Before explaining the steps, we need to be aware that there is a requirement for several arrays at various times, and learning the right method can save our coding time. You will find more than four methods to extend an array with another. So, most likely, find an easy-to-remember method in the tutorial. Using Array push() Method and Spread Syntax The push() method is extremely useful in adding items to an existing JavaScript array. Moreover, you can pass a variety of different arguments based ... Read More

In this tutorial, we will learn how to merge two arrays in JavaScript. In JavaScript, we can merge two arrays in different approaches, and in this tutorial, we will see some of the approaches for doing this − Using the Array concate() method Using the spread operator Using the loop iteration Using the Array concate() method The Array concate() method merges two or multiple arrays. It is one of the best method to merge arrays in JavaScript. This method operates on an array, takes another array in the parameters, and returns a new one after merging these ... Read More

In this tutorial, we will try to get the last element in an array using the following three approaches − Using Array length Property. Using the slice() Method. Using the pop() Method. Using Array length Property The length property of an array returns the number of elements in an array. The array index will start from 0, and the last index will total the length of array -1. For example, if the length of the array is 5 the indexing numbering will be 0 to 4. That means if we want to get the last element, the index ... Read More

To compare two arrays in Javascript, there are various approaches we can use. We will be understanding various approaches in this article. When comparing two arrays, we cannot use “==” or “===” operator as it compares the addresses of the memory block to which both the arrays are pointing resulting in a false result. In this article we are having two arrays and our task is to compare two arrays in JavaScript. Approaches to Compare Arrays in JavaScript Here is a list of approaches to compare two arrays in JavaScript which we will be discussing in this article with stepwise ... Read More

We will learn how to add new array elements at the beginning of an array in JavaScript. To achieve this in JavaScript we have multiple ways, a few of them are following. Using the Array unshift() Method Using the Array splice() Method Using ES6 Spread Operator Using the Array unshift() Method The array unshift() method in JavaScript is used to add new elements at the start of the array. This method changes the original array by overwriting the elements inside it. Syntax arr.unshift(element1, element2, . . . . . . , elementN) Parameter element1, element2, …, ... Read More

In this tutorial, we shall learn to access the methods of an array of objects in JavaScript. What is an array of objects? An array of objects can store several values in a single variable. Every value has an array index. The values can be objects, booleans, functions, numbers, strings, or another array. Arrays are extremely flexible because they are listed as objects. Therefore, we can access it easily. An array of objects has a lot of built-in methods. Some are concat, forEach, join, indexOf, splice, sort, slice, lastIndexOf, filter, map, pop, shift, push, unshift, reverse, find, reduce, isArray, length, ... Read More

The Array object lets you store multiple values in a single variable. It stores a fixed-size sequential collection of elements of the same type.Here is a list of some of the methods of the Array object:S.NoMethod & Description       1concat()Returns a new array comprised of this array joined with other array(s) and/or value(s).        2every()Returns true if every element in this array satisfies the provided testing function.        3filter()Creates a new array with all of the elements of this array for which the provided filtering function returns true.        4forEach()Calls a function for ... Read More

In this tutorial, we will learn how to access the properties of an array of objects in JavaScript. JavaScript is built on a basic object-oriented paradigm. A collection of properties is an object, and property is a relationship between a name (or key) and a value. The value of a property can be a function, in which case the property is known as a method. A JavaScript object is associated with properties. An object's property may be thought of as a variable that is associated with the object. Except for the attachment to objects, object attributes are the same as ... Read More

To create an array of strings in JavaScript, simply assign values −var animals = ["Time", "Money", "Work"];You can also use the new keyword to create an array of strings in JavaScript −var animals = new Array("Time", "Money", "Work");The Array parameter is a list of strings or integers. When you specify a single numeric parameter with the Array constructor, you specify the initial length of the array. The maximum length allowed for an array is 4, 294, 967, 295.ExampleLet’s see an example to create arrays in JavaScript −Live Demo                     JavaScript Arrays ... Read More

The Array object lets you store multiple values in a single variable. It stores a fixed-size sequential collection of elements of the same type.The following is the list of the properties of the Array object −Sr.NoProperty & Description1constructorReturns a reference to the array function that created the object.2indexThe property represents the zero-based index of the match in the string.3inputThis property is only present in arrays created by regular expression matches.4lengthReflects the number of elements in an array.5prototypeThe prototype property allows you to add properties and methods to an object.ExampleLet’s see an example of the prototype propertyLive Demo       ... Read More