Array map Method in JavaScript | JavaScript Array Methods | Beginners tutorial
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🧡 Hello All JavaScript Lovers Outhere!
Today you're going to learn about the Array Object In JavaScript.
This tutorial is a series of videos, in each video we will discuss a method (or more) of the Array Object in JavaScript.
In today's video, you're going to learn about the map method.
map() creates a new array from calling a function for every array element.
map() calls a function once for each element in an array.
map() does not execute the function for empty elements.
map() does not change the original array.
🟢🟠 The Array.map().
🔷 Syntax :
// Callback function
map(callbackFn)
map(callbackFn, thisArg)
// Inline callback function
map(function(element) { /* … */ })
map(function(element, index) { /* … */ })
map(function(element, index, array){ /* … */ })
map(function(element, index, array) { /* … */ }, thisArg)
🔹callbackFn : Function to execute on each element.
The function is called with the following arguments:
🔹element : The current element being processed in the array.
🔹index : The index of element in the array.
🔹array : The array forEach() was called upon.
🔹thisArg (Optional) : Value to use as this when executing callbackFn.
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