![]() ![]() Step 1 - Calling a Function on Each Item in an Array To install Node.js locally, you can follow the steps at How to Install Node.js and Create a Local Development Environment.Ĭhrome DevTools are available by downloading and installing the latest version of Google Chrome. This tutorial does not require any coding, but if you are interested in following along with the examples, you can either use the Node.js REPL or browser developer tools. map() in JavaScript: calling a function of array elements, converting strings to arrays, rendering lists in JavaScript libraries, and reformatting array objects. In this tutorial, you’ll look at four noteworthy uses of. This method can have many uses when working with arrays. ![]() map() method.map() creates an array from calling a specific function on each item in the parent array.map() is a non-mutating method that creates a new array, as opposed to mutating methods, which only make changes to the calling array. From the classic for loop to the forEach() method, various techniques and methods are used to iterate through datasets in JavaScript. ![]()
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