es.typed-array.filter.js

'use strict';
var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
var $filter = require('../internals/array-iteration').filter;
var speciesConstructor = require('../internals/species-constructor');

var aTypedArray = ArrayBufferViewCore.aTypedArray;
var aTypedArrayConstructor = ArrayBufferViewCore.aTypedArrayConstructor;

// `%TypedArray%.prototype.filter` method
// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.filter
ArrayBufferViewCore.exportProto('filter', function filter(callbackfn /* , thisArg */) {
  var list = $filter(aTypedArray(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
  var C = speciesConstructor(this, this.constructor);
  var index = 0;
  var length = list.length;
  var result = new (aTypedArrayConstructor(C))(length);
  while (length > index) result[index] = list[index++];
  return result;
});