JavaScript typedArray.map() Method

The typedArray.map() is an inbuilt function in JavaScript which is used to create a new typedArray with the result of a provided function on each element of the given typedArray. 

Syntax:

typedArray.map(callback)

Parameters: It accepts a parameter callback function which accept some parameter which are specified below-

• currentValue: It is the current element which is being processed in the typedArray.
• index: It is the index of the current element which is being processed in the typedArray.
• array: It is the typedArray which is being called.

Return value: It returns a new typedArray with the result of a provided function on each element of the given typedArray.

Example 1:

javascript

// Creating a typedArray with some elements
const A = new Uint8Array([4, 9, 16, 25, 36]);

// Calling map() function with the parameter
// Math.sqrt function which find square root
// of the typedArray's elements
const B = A.map(Math.sqrt);

// Printing the result of the function
console.log(B);

Output:

2,3,4,5,6

Example 2:

javascript

// Creating a typedArray with some elements
var A = new Uint8Array([1, 2, 3, 4, 5, 6]);

// Calling map() function
var B = A.map(function(a) {
    return a * 5;
});

// Returning the results
console.log(B);

Output:

5,10,15,20,25,30