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Editing: es.typed-array.set.js

'use strict';
var global = require('../internals/global');
var call = require('../internals/function-call');
var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
var lengthOfArrayLike = require('../internals/length-of-array-like');
var toOffset = require('../internals/to-offset');
var toIndexedObject = require('../internals/to-object');
var fails = require('../internals/fails');

var RangeError = global.RangeError;
var Int8Array = global.Int8Array;
var Int8ArrayPrototype = Int8Array && Int8Array.prototype;
var $set = Int8ArrayPrototype && Int8ArrayPrototype.set;
var aTypedArray = ArrayBufferViewCore.aTypedArray;
var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;

var WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS = !fails(function () {
  // eslint-disable-next-line es/no-typed-arrays -- required for testing
  var array = new Uint8ClampedArray(2);
  call($set, array, { length: 1, 0: 3 }, 1);
  return array[1] !== 3;
});

// https://bugs.chromium.org/p/v8/issues/detail?id=11294 and other
var TO_OBJECT_BUG = WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS && ArrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS && fails(function () {
  var array = new Int8Array(2);
  array.set(1);
  array.set('2', 1);
  return array[0] !== 0 || array[1] !== 2;
});

// `%TypedArray%.prototype.set` method
// https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
exportTypedArrayMethod('set', function set(arrayLike /* , offset */) {
  aTypedArray(this);
  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
  var src = toIndexedObject(arrayLike);
  if (WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS) return call($set, this, src, offset);
  var length = this.length;
  var len = lengthOfArrayLike(src);
  var index = 0;
  if (len + offset > length) throw RangeError('Wrong length');
  while (index < len) this[offset + index] = src[index++];
}, !WORKS_WITH_OBJECTS_AND_GEERIC_ON_TYPED_ARRAYS || TO_OBJECT_BUG);

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