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38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
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/** PURE_IMPORTS_START tslib,_Subscriber 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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export function pairwise() {
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return function (source) { return source.lift(new PairwiseOperator()); };
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}
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var PairwiseOperator = /*@__PURE__*/ (function () {
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function PairwiseOperator() {
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}
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PairwiseOperator.prototype.call = function (subscriber, source) {
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return source.subscribe(new PairwiseSubscriber(subscriber));
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};
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return PairwiseOperator;
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}());
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var PairwiseSubscriber = /*@__PURE__*/ (function (_super) {
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tslib_1.__extends(PairwiseSubscriber, _super);
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function PairwiseSubscriber(destination) {
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var _this = _super.call(this, destination) || this;
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_this.hasPrev = false;
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return _this;
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}
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PairwiseSubscriber.prototype._next = function (value) {
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var pair;
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if (this.hasPrev) {
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pair = [this.prev, value];
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}
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else {
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this.hasPrev = true;
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}
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this.prev = value;
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if (pair) {
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this.destination.next(pair);
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}
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};
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return PairwiseSubscriber;
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}(Subscriber));
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//# sourceMappingURL=pairwise.js.map
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