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1 lines
1.3 KiB
1 lines
1.3 KiB
{"ast":null,"code":"import { Subscriber } from '../Subscriber';\nimport { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';\nexport function skipLast(count) {\n return source => source.lift(new SkipLastOperator(count));\n}\n\nclass SkipLastOperator {\n constructor(_skipCount) {\n this._skipCount = _skipCount;\n\n if (this._skipCount < 0) {\n throw new ArgumentOutOfRangeError();\n }\n }\n\n call(subscriber, source) {\n if (this._skipCount === 0) {\n return source.subscribe(new Subscriber(subscriber));\n } else {\n return source.subscribe(new SkipLastSubscriber(subscriber, this._skipCount));\n }\n }\n\n}\n\nclass SkipLastSubscriber extends Subscriber {\n constructor(destination, _skipCount) {\n super(destination);\n this._skipCount = _skipCount;\n this._count = 0;\n this._ring = new Array(_skipCount);\n }\n\n _next(value) {\n const skipCount = this._skipCount;\n const count = this._count++;\n\n if (count < skipCount) {\n this._ring[count] = value;\n } else {\n const currentIndex = count % skipCount;\n const ring = this._ring;\n const oldValue = ring[currentIndex];\n ring[currentIndex] = value;\n this.destination.next(oldValue);\n }\n }\n\n} //# sourceMappingURL=skipLast.js.map","map":null,"metadata":{},"sourceType":"module"}
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