.

node_modules/rxjs/dist/cjs/internal/operators/distinctUntilChanged.js

@@ -0,0 +1,27 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.distinctUntilChanged = void 0;
+var identity_1 = require("../util/identity");
+var lift_1 = require("../util/lift");
+var OperatorSubscriber_1 = require("./OperatorSubscriber");
+function distinctUntilChanged(comparator, keySelector) {
+    if (keySelector === void 0) { keySelector = identity_1.identity; }
+    comparator = comparator !== null && comparator !== void 0 ? comparator : defaultCompare;
+    return lift_1.operate(function (source, subscriber) {
+        var previousKey;
+        var first = true;
+        source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
+            var currentKey = keySelector(value);
+            if (first || !comparator(previousKey, currentKey)) {
+                first = false;
+                previousKey = currentKey;
+                subscriber.next(value);
+            }
+        }));
+    });
+}
+exports.distinctUntilChanged = distinctUntilChanged;
+function defaultCompare(a, b) {
+    return a === b;
+}
+//# sourceMappingURL=distinctUntilChanged.js.map