Repositorio del curso CCOM4030 el semestre B91 del proyecto Artesanías con el Instituto de Cultura

scan.js 2.7KB

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  1. "use strict";
  2. var __extends = (this && this.__extends) || (function () {
  3. var extendStatics = function (d, b) {
  4. extendStatics = Object.setPrototypeOf ||
  5. ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
  6. function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
  7. return extendStatics(d, b);
  8. }
  9. return function (d, b) {
  10. extendStatics(d, b);
  11. function __() { this.constructor = d; }
  12. d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  13. };
  14. })();
  15. Object.defineProperty(exports, "__esModule", { value: true });
  16. var Subscriber_1 = require("../Subscriber");
  17. function scan(accumulator, seed) {
  18. var hasSeed = false;
  19. if (arguments.length >= 2) {
  20. hasSeed = true;
  21. }
  22. return function scanOperatorFunction(source) {
  23. return source.lift(new ScanOperator(accumulator, seed, hasSeed));
  24. };
  25. }
  26. exports.scan = scan;
  27. var ScanOperator = (function () {
  28. function ScanOperator(accumulator, seed, hasSeed) {
  29. if (hasSeed === void 0) { hasSeed = false; }
  30. this.accumulator = accumulator;
  31. this.seed = seed;
  32. this.hasSeed = hasSeed;
  33. }
  34. ScanOperator.prototype.call = function (subscriber, source) {
  35. return source.subscribe(new ScanSubscriber(subscriber, this.accumulator, this.seed, this.hasSeed));
  36. };
  37. return ScanOperator;
  38. }());
  39. var ScanSubscriber = (function (_super) {
  40. __extends(ScanSubscriber, _super);
  41. function ScanSubscriber(destination, accumulator, _seed, hasSeed) {
  42. var _this = _super.call(this, destination) || this;
  43. _this.accumulator = accumulator;
  44. _this._seed = _seed;
  45. _this.hasSeed = hasSeed;
  46. _this.index = 0;
  47. return _this;
  48. }
  49. Object.defineProperty(ScanSubscriber.prototype, "seed", {
  50. get: function () {
  51. return this._seed;
  52. },
  53. set: function (value) {
  54. this.hasSeed = true;
  55. this._seed = value;
  56. },
  57. enumerable: true,
  58. configurable: true
  59. });
  60. ScanSubscriber.prototype._next = function (value) {
  61. if (!this.hasSeed) {
  62. this.seed = value;
  63. this.destination.next(value);
  64. }
  65. else {
  66. return this._tryNext(value);
  67. }
  68. };
  69. ScanSubscriber.prototype._tryNext = function (value) {
  70. var index = this.index++;
  71. var result;
  72. try {
  73. result = this.accumulator(this.seed, value, index);
  74. }
  75. catch (err) {
  76. this.destination.error(err);
  77. }
  78. this.seed = result;
  79. this.destination.next(result);
  80. };
  81. return ScanSubscriber;
  82. }(Subscriber_1.Subscriber));
  83. //# sourceMappingURL=scan.js.map