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node_modules/rxjs/_esm2015/internal/operators/take.js

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+import { Subscriber } from '../Subscriber';
+import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
+import { empty } from '../observable/empty';
+export function take(count) {
+    return (source) => {
+        if (count === 0) {
+            return empty();
+        }
+        else {
+            return source.lift(new TakeOperator(count));
+        }
+    };
+}
+class TakeOperator {
+    constructor(total) {
+        this.total = total;
+        if (this.total < 0) {
+            throw new ArgumentOutOfRangeError;
+        }
+    }
+    call(subscriber, source) {
+        return source.subscribe(new TakeSubscriber(subscriber, this.total));
+    }
+}
+class TakeSubscriber extends Subscriber {
+    constructor(destination, total) {
+        super(destination);
+        this.total = total;
+        this.count = 0;
+    }
+    _next(value) {
+        const total = this.total;
+        const count = ++this.count;
+        if (count <= total) {
+            this.destination.next(value);
+            if (count === total) {
+                this.destination.complete();
+                this.unsubscribe();
+            }
+        }
+    }
+}
+//# sourceMappingURL=take.js.map