Creates a typed array from an array-like or iterable object.
from(arrayLike, mapfn?, thisArg?)
arrayLike
An array-like or iterable object to convert to a typed array.
mapfn optional function(value, index)
A mapping function to call on every element of the array.
thisArg optional
Value of this used to invoke the mapfn.
Int32Array.from([1, 2, 3])
Int32Array [ 1, 2, 3 ]