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27 Nov 2018 JavaScript Array functions are extremely powerful and easy to use Each of the Array functions we will cover accept a function as a parameter.12 Nov 2017 The map() method is used to apply a function on every element in an array. A new array is then returned. You can think of map() as a for loop, JavaScript arrays are used to store multiple values in a single variable. . The easiest way to add a new element to an array is using the push() method: An array can store elements of any type. For instance: // mix of values let arr = [ 'Apple', { name: 'John' }, true, function() { alert('hello'); } ]; // get the object at index Both of these functions are widely used in industry and makes the Javascript code Given an array, write a function to check if all elements of that array are less JavaScript has a function called replace that does exactly what we want! Functions take . To check that the new cat made it into your array you can use .length :. Because JavaScript has variables and properties associated with arrays, you have to use a special function to create a new array. This example shows how you However, there are important differences between arrays in Javascript and other ECMAScript 5 come with the solution by introducing the method Array. JavaScript array object - Learn Javascript in simple and easy steps starting from basic to Apply a function simultaneously against two values of the array (from 28 Jan 2019 Other changes to the array (setting the value of or deleting an element) may affect the results of the operation if the method visits the changed