Javascript Map Map Function

The map () method in javascript creates an array by calling a specific function on each element present in the parent array. The index of the current element being processed in the array. In this tutorial, you will learn about the javascript map object that maps a key to a value.

Map() creates a new array from calling a function for every array element. Get() gets the value for a key in a map: Map calls a provided callback function once for each element in an array, in order, and constructs a new array from the results.

A map 's keys can be any value (including functions, objects, or any primitive).

Foreach() calls a function for each key/value pair in a map: The array.map () method allows you to iterate over an array and modify its elements using a callback function. You could do so by creating a function that multiplies every array item by two, and moving that function into a map () method. The keys in map are ordered in a simple, straightforward way: