1d141417be89837654f2a83ad014f59b3479e8c64e8b4d143719b72e973d8e418e962e0a8ba54901a76809ada8b6efa4767ca4703514a48e3645856398b3c7 2.6 KB

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  1. 'use strict';
  2. // TODO: Remove from `core-js@4`
  3. var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
  4. var lengthOfArrayLike = require('../internals/length-of-array-like');
  5. var isBigIntArray = require('../internals/is-big-int-array');
  6. var toAbsoluteIndex = require('../internals/to-absolute-index');
  7. var toBigInt = require('../internals/to-big-int');
  8. var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
  9. var fails = require('../internals/fails');
  10. var aTypedArray = ArrayBufferViewCore.aTypedArray;
  11. var getTypedArrayConstructor = ArrayBufferViewCore.getTypedArrayConstructor;
  12. var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
  13. var max = Math.max;
  14. var min = Math.min;
  15. // some early implementations, like WebKit, does not follow the final semantic
  16. var PROPER_ORDER = !fails(function () {
  17. // eslint-disable-next-line es/no-typed-arrays -- required for testing
  18. var array = new Int8Array([1]);
  19. var spliced = array.toSpliced(1, 0, {
  20. valueOf: function () {
  21. array[0] = 2;
  22. return 3;
  23. }
  24. });
  25. return spliced[0] !== 2 || spliced[1] !== 3;
  26. });
  27. // `%TypedArray%.prototype.toSpliced` method
  28. // https://tc39.es/proposal-change-array-by-copy/#sec-%typedarray%.prototype.toSpliced
  29. exportTypedArrayMethod('toSpliced', function toSpliced(start, deleteCount /* , ...items */) {
  30. var O = aTypedArray(this);
  31. var C = getTypedArrayConstructor(O);
  32. var len = lengthOfArrayLike(O);
  33. var actualStart = toAbsoluteIndex(start, len);
  34. var argumentsLength = arguments.length;
  35. var k = 0;
  36. var insertCount, actualDeleteCount, thisIsBigIntArray, convertedItems, value, newLen, A;
  37. if (argumentsLength === 0) {
  38. insertCount = actualDeleteCount = 0;
  39. } else if (argumentsLength === 1) {
  40. insertCount = 0;
  41. actualDeleteCount = len - actualStart;
  42. } else {
  43. actualDeleteCount = min(max(toIntegerOrInfinity(deleteCount), 0), len - actualStart);
  44. insertCount = argumentsLength - 2;
  45. if (insertCount) {
  46. convertedItems = new C(insertCount);
  47. thisIsBigIntArray = isBigIntArray(convertedItems);
  48. for (var i = 2; i < argumentsLength; i++) {
  49. value = arguments[i];
  50. // FF30- typed arrays doesn't properly convert objects to typed array values
  51. convertedItems[i - 2] = thisIsBigIntArray ? toBigInt(value) : +value;
  52. }
  53. }
  54. }
  55. newLen = len + insertCount - actualDeleteCount;
  56. A = new C(newLen);
  57. for (; k < actualStart; k++) A[k] = O[k];
  58. for (; k < actualStart + insertCount; k++) A[k] = convertedItems[k - actualStart];
  59. for (; k < newLen; k++) A[k] = O[k + actualDeleteCount - insertCount];
  60. return A;
  61. }, !PROPER_ORDER);