The Uint32Array array represents an array of 32-bit unsigned integers in the platform byte order. By default, the contents of Uint32Array are initialized to 0.
from() function of Uint32Array used to creates a new Uint32Array from an array-like or iterable object. So when you want to convert an arrayLike or iterable object then you can be used this function by passing the object as a parameter to this function along with map function and value used for map function if needed.
Synatx:
Uint32Array.from(source[, mapFn[, thisArg]])
parameters: This method accepts three parameters that are specified below:
- source: This parameter is an array-like or iterable object which is used to convert to a Uint32Array object.
- mapFn: This parameter is Optional which is Map function to call on every element of the Uint32Array array.
- thisArg: This parameter is Optional which is value to use as this when executing mapFn.
Return Value: this method returns a new Uint32Array instance.
JavaScript program to Illustrate the working of from() function:
Program 1:
<script> //create a Uint32Array from a string like structure var array = Uint32Array.from('987654321234567'); //print the result document.write(array); </script> |
Output:
9, 8, 7, 6, 5, 4, 3, 2, 1, 2, 3, 4, 5, 6, 7
Program 2:
<script> //create a Uint32Array from a array by //dividing by 32 to each number using function var array = Uint32Array.from([543234, 432345, 5432123, 43234, 23432, 5432345, 432345, 23432 ], z => z / 32); //print the result document.write(array); </script> |
Output:
16976, 13510, 169753, 1351, 732, 169760, 13510, 732
References:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/from#
