51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
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/** PURE_IMPORTS_START tslib,_Subscriber,_util_ArgumentOutOfRangeError PURE_IMPORTS_END */
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import * as tslib_1 from "tslib";
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import { Subscriber } from '../Subscriber';
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import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
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export function skipLast(count) {
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return function (source) { return source.lift(new SkipLastOperator(count)); };
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}
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var SkipLastOperator = /*@__PURE__*/ (function () {
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function SkipLastOperator(_skipCount) {
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this._skipCount = _skipCount;
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if (this._skipCount < 0) {
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throw new ArgumentOutOfRangeError;
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}
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}
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SkipLastOperator.prototype.call = function (subscriber, source) {
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if (this._skipCount === 0) {
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return source.subscribe(new Subscriber(subscriber));
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}
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else {
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return source.subscribe(new SkipLastSubscriber(subscriber, this._skipCount));
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}
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};
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return SkipLastOperator;
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}());
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var SkipLastSubscriber = /*@__PURE__*/ (function (_super) {
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tslib_1.__extends(SkipLastSubscriber, _super);
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function SkipLastSubscriber(destination, _skipCount) {
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var _this = _super.call(this, destination) || this;
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_this._skipCount = _skipCount;
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_this._count = 0;
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_this._ring = new Array(_skipCount);
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return _this;
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}
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SkipLastSubscriber.prototype._next = function (value) {
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var skipCount = this._skipCount;
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var count = this._count++;
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if (count < skipCount) {
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this._ring[count] = value;
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}
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else {
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var currentIndex = count % skipCount;
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var ring = this._ring;
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var oldValue = ring[currentIndex];
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ring[currentIndex] = value;
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this.destination.next(oldValue);
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}
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};
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return SkipLastSubscriber;
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}(Subscriber));
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//# sourceMappingURL=skipLast.js.map
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