The Uint8Array.from()
method in JavaScript is used to create a new Uint8Array
from an array-like or iterable object. It allows you to transform an existing array or iterable into a new Uint8Array
instance, where each element of the new array is represented as an 8-bit unsigned integer.
Syntax:
Uint8Array.from( source, mapFn, thisArg )
Parameters:
This method accepts three parameters as mentioned above and described below:
- source: This parameter contains an array-like or iterable object which is used to convert to a Uint8Array object.
- mapFn: It is an optional parameter which is the Map function to call on every element of the Uint8Array array.
- thisArg: It is an optional parameter that stores the value to use as this when executing mapFn.
Return Value:
This method returns a new Uint8Array instance.
Example 1: In this example, we will see the basic functionality of the Uint8Array array to create new Uint8array from a string of integers.
// Create a Uint8Array from a // string like structure let array = Uint8Array.from( '45465768654323456' );
// Display the result console.log(array); |
Uint8Array(17) [ 4, 5, 4, 6, 5, 7, 6, 8, 6, 5, 4, 3, 2, 3, 4, 5, 6 ]
Example 2: In this example, we will see the basic functionality of the Uint8Array array to create a new Unit8array performing the required transformations.
// Create a Uint8Array from a array by adding // 3 to each number using function let array = Uint8Array.from( [1, 2, 3, 4, 5, 6],
(z) => z + 3
); // Display the result console.log(array); |
Uint8Array(6) [ 4, 5, 6, 7, 8, 9 ]