How to copy TypedArray into another TypedArray?

Question

C# has a high performance array copying function to copy arrays in place:

Array.Copy(source, destination, length)

It\'s faster tha

Answer 1

You can clone an array using slice(0);.

var clone = myArray.slice(0);

And you can make it a native method:

Array.prototype.clone = function() {
    return this.slice(0);
};

Performance link comparing to loop

Answer 2

You're looking for .set which allows you to set the values of an array using an input array (or TypedArray), optionally starting at some offset on the destination array:

destination.set(source);
destination.set(source, offset);

Or, to set a limited amount of the input array:

destination.set(source.slice(limit), offset);

If you instead want to create a new TypedArray, you can simply use .slice:

source.slice();

Answer 3

clone to an exist typedarray:

destination.set(source);
destination.set(source, offset);

clone to a new typedarray example: (It's fastest!)

var source = new Uint8Array([1,2,3]);
var cloned = new Uint8Array(source);