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node_modules/rxjs/_esm5/operators/sequenceEqual.js

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+/** PURE_IMPORTS_START .._Subscriber,.._util_tryCatch,.._util_errorObject PURE_IMPORTS_END */
+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 __());
+};
+import { Subscriber } from '../Subscriber';
+import { tryCatch } from '../util/tryCatch';
+import { errorObject } from '../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
+ */
+export function sequenceEqual(compareTo, comparor) {
+    return function (source) { return source.lift(new SequenceEqualOperator(compareTo, comparor)); };
+}
+export var SequenceEqualOperator = /*@__PURE__*/ (/*@__PURE__*/ 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;
+}());
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export var SequenceEqualSubscriber = /*@__PURE__*/ (/*@__PURE__*/ 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(comparor)(a, b);
+                if (areEqual === errorObject) {
+                    this.destination.error(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));
+var SequenceEqualCompareToSubscriber = /*@__PURE__*/ (/*@__PURE__*/ 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));
+//# sourceMappingURL=sequenceEqual.js.map