feat: initial commit

node_modules/rxjs/internal/operators/distinct.d.ts

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+import { Observable } from '../Observable';
+import { Subscriber } from '../Subscriber';
+import { MonoTypeOperatorFunction } from '../types';
+import { SimpleOuterSubscriber } from '../innerSubscribe';
+/**
+ * Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from previous items.
+ *
+ * If a keySelector function is provided, then it will project each value from the source observable into a new value that it will
+ * check for equality with previously projected values. If a keySelector function is not provided, it will use each value from the
+ * source observable directly with an equality check against previous values.
+ *
+ * In JavaScript runtimes that support `Set`, this operator will use a `Set` to improve performance of the distinct value checking.
+ *
+ * In other runtimes, this operator will use a minimal implementation of `Set` that relies on an `Array` and `indexOf` under the
+ * hood, so performance will degrade as more values are checked for distinction. Even in newer browsers, a long-running `distinct`
+ * use might result in memory leaks. To help alleviate this in some scenarios, an optional `flushes` parameter is also provided so
+ * that the internal `Set` can be "flushed", basically clearing it of values.
+ *
+ * ## Examples
+ * A simple example with numbers
+ * ```ts
+ * import { of } from 'rxjs';
+ * import { distinct } from 'rxjs/operators';
+ *
+ * of(1, 1, 2, 2, 2, 1, 2, 3, 4, 3, 2, 1).pipe(
+ *     distinct(),
+ *   )
+ *   .subscribe(x => console.log(x)); // 1, 2, 3, 4
+ * ```
+ *
+ * An example using a keySelector function
+ * ```typescript
+ * import { of } from 'rxjs';
+ * import { distinct } from 'rxjs/operators';
+ *
+ * interface Person {
+ *    age: number,
+ *    name: string
+ * }
+ *
+ * of<Person>(
+ *     { age: 4, name: 'Foo'},
+ *     { age: 7, name: 'Bar'},
+ *     { age: 5, name: 'Foo'},
+ *   ).pipe(
+ *     distinct((p: Person) => p.name),
+ *   )
+ *   .subscribe(x => console.log(x));
+ *
+ * // displays:
+ * // { age: 4, name: 'Foo' }
+ * // { age: 7, name: 'Bar' }
+ * ```
+ * @see {@link distinctUntilChanged}
+ * @see {@link distinctUntilKeyChanged}
+ *
+ * @param {function} [keySelector] Optional function to select which value you want to check as distinct.
+ * @param {Observable} [flushes] Optional Observable for flushing the internal HashSet of the operator.
+ * @return {Observable} An Observable that emits items from the source Observable with distinct values.
+ * @method distinct
+ * @owner Observable
+ */
+export declare function distinct<T, K>(keySelector?: (value: T) => K, flushes?: Observable<any>): MonoTypeOperatorFunction<T>;
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export declare class DistinctSubscriber<T, K> extends SimpleOuterSubscriber<T, T> {
+    private keySelector?;
+    private values;
+    constructor(destination: Subscriber<T>, keySelector?: (value: T) => K, flushes?: Observable<any>);
+    notifyNext(): void;
+    notifyError(error: any): void;
+    protected _next(value: T): void;
+    private _useKeySelector;
+    private _finalizeNext;
+}