wishthis/node_modules/rxjs/internal/operators/pairwise.js

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2022-01-21 08:28:41 +00:00
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var Subscriber_1 = require("../Subscriber");
function pairwise() {
return function (source) { return source.lift(new PairwiseOperator()); };
}
exports.pairwise = pairwise;
var PairwiseOperator = (function () {
function PairwiseOperator() {
}
PairwiseOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new PairwiseSubscriber(subscriber));
};
return PairwiseOperator;
}());
var PairwiseSubscriber = (function (_super) {
__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_1.Subscriber));
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