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keksAccountGUI/node_modulesOLD/rxjs/_esm5/internal/operators/pairwise.js
2019-08-11 20:48:02 +02:00

37 lines
1.2 KiB
JavaScript

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