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tatianamac
2019-11-26 14:50:43 -08:00
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node_modules/rxjs/operators/sequenceEqual.js generated vendored Normal file
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"use strict";
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var Subscriber_1 = require('../Subscriber');
var tryCatch_1 = require('../util/tryCatch');
var errorObject_1 = require('../util/errorObject');
/**
* Compares all values of two observables in sequence using an optional comparor function
* and returns an observable of a single boolean value representing whether or not the two sequences
* are equal.
*
* <span class="informal">Checks to see of all values emitted by both observables are equal, in order.</span>
*
* <img src="./img/sequenceEqual.png" width="100%">
*
* `sequenceEqual` subscribes to two observables and buffers incoming values from each observable. Whenever either
* observable emits a value, the value is buffered and the buffers are shifted and compared from the bottom
* up; If any value pair doesn't match, the returned observable will emit `false` and complete. If one of the
* observables completes, the operator will wait for the other observable to complete; If the other
* observable emits before completing, the returned observable will emit `false` and complete. If one observable never
* completes or emits after the other complets, the returned observable will never complete.
*
* @example <caption>figure out if the Konami code matches</caption>
* var code = Rx.Observable.from([
* "ArrowUp",
* "ArrowUp",
* "ArrowDown",
* "ArrowDown",
* "ArrowLeft",
* "ArrowRight",
* "ArrowLeft",
* "ArrowRight",
* "KeyB",
* "KeyA",
* "Enter" // no start key, clearly.
* ]);
*
* var keys = Rx.Observable.fromEvent(document, 'keyup')
* .map(e => e.code);
* var matches = keys.bufferCount(11, 1)
* .mergeMap(
* last11 =>
* Rx.Observable.from(last11)
* .sequenceEqual(code)
* );
* matches.subscribe(matched => console.log('Successful cheat at Contra? ', matched));
*
* @see {@link combineLatest}
* @see {@link zip}
* @see {@link withLatestFrom}
*
* @param {Observable} compareTo The observable sequence to compare the source sequence to.
* @param {function} [comparor] An optional function to compare each value pair
* @return {Observable} An Observable of a single boolean value representing whether or not
* the values emitted by both observables were equal in sequence.
* @method sequenceEqual
* @owner Observable
*/
function sequenceEqual(compareTo, comparor) {
return function (source) { return source.lift(new SequenceEqualOperator(compareTo, comparor)); };
}
exports.sequenceEqual = sequenceEqual;
var SequenceEqualOperator = (function () {
function SequenceEqualOperator(compareTo, comparor) {
this.compareTo = compareTo;
this.comparor = comparor;
}
SequenceEqualOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new SequenceEqualSubscriber(subscriber, this.compareTo, this.comparor));
};
return SequenceEqualOperator;
}());
exports.SequenceEqualOperator = SequenceEqualOperator;
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var SequenceEqualSubscriber = (function (_super) {
__extends(SequenceEqualSubscriber, _super);
function SequenceEqualSubscriber(destination, compareTo, comparor) {
_super.call(this, destination);
this.compareTo = compareTo;
this.comparor = comparor;
this._a = [];
this._b = [];
this._oneComplete = false;
this.add(compareTo.subscribe(new SequenceEqualCompareToSubscriber(destination, this)));
}
SequenceEqualSubscriber.prototype._next = function (value) {
if (this._oneComplete && this._b.length === 0) {
this.emit(false);
}
else {
this._a.push(value);
this.checkValues();
}
};
SequenceEqualSubscriber.prototype._complete = function () {
if (this._oneComplete) {
this.emit(this._a.length === 0 && this._b.length === 0);
}
else {
this._oneComplete = true;
}
};
SequenceEqualSubscriber.prototype.checkValues = function () {
var _c = this, _a = _c._a, _b = _c._b, comparor = _c.comparor;
while (_a.length > 0 && _b.length > 0) {
var a = _a.shift();
var b = _b.shift();
var areEqual = false;
if (comparor) {
areEqual = tryCatch_1.tryCatch(comparor)(a, b);
if (areEqual === errorObject_1.errorObject) {
this.destination.error(errorObject_1.errorObject.e);
}
}
else {
areEqual = a === b;
}
if (!areEqual) {
this.emit(false);
}
}
};
SequenceEqualSubscriber.prototype.emit = function (value) {
var destination = this.destination;
destination.next(value);
destination.complete();
};
SequenceEqualSubscriber.prototype.nextB = function (value) {
if (this._oneComplete && this._a.length === 0) {
this.emit(false);
}
else {
this._b.push(value);
this.checkValues();
}
};
return SequenceEqualSubscriber;
}(Subscriber_1.Subscriber));
exports.SequenceEqualSubscriber = SequenceEqualSubscriber;
var SequenceEqualCompareToSubscriber = (function (_super) {
__extends(SequenceEqualCompareToSubscriber, _super);
function SequenceEqualCompareToSubscriber(destination, parent) {
_super.call(this, destination);
this.parent = parent;
}
SequenceEqualCompareToSubscriber.prototype._next = function (value) {
this.parent.nextB(value);
};
SequenceEqualCompareToSubscriber.prototype._error = function (err) {
this.parent.error(err);
};
SequenceEqualCompareToSubscriber.prototype._complete = function () {
this.parent._complete();
};
return SequenceEqualCompareToSubscriber;
}(Subscriber_1.Subscriber));
//# sourceMappingURL=sequenceEqual.js.map