Does splice exist for TypedArrays or is there an equivalent?

Question

Is there or is there ever going to be an equivalent of Array.prototype.splice for TypedArrays?

I want to be able to delete a range of items from a TypedArray.

Answer 1

So TypedArrays in ES6 are not classical Javascript arrays, but closer to an API for a underlying binary buffer (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays).

Since splice mutates the actual length of array it isn't usable with TypedArrays (http://www.es6fiddle.net/idt0ugqo/).

You can create similar behavior by creating your own splice (although it will be slower).

This is a simple equivalent except that it doesn't account for all nuances of `splice. As @bergi commented, I don't allow negative values.

function splice(arr, starting, deleteCount, elements) {
  if (arguments.length === 1) {
    return arr;
  }
  starting = Math.max(starting, 0);
  deleteCount = Math.max(deleteCount, 0);
  elements = elements || [];


  const newSize = arr.length - deleteCount + elements.length;
  const splicedArray = new arr.constructor(newSize);

  splicedArray.set(arr.subarray(0, starting));
  splicedArray.set(elements, starting);
  splicedArray.set(arr.subarray(starting + deleteCount), starting + elements.length);
  return splicedArray;
};

splice(new Uint8Array([1,2,3]), 0, 1); // returns Uint8Array([1,3])

http://www.es6fiddle.net/idt3epy2/