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47 lines
1.4 KiB
TypeScript
47 lines
1.4 KiB
TypeScript
import { MonoTypeOperatorFunction } from '../types';
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/**
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* The Min operator operates on an Observable that emits numbers (or items that can be compared with a provided function),
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* and when source Observable completes it emits a single item: the item with the smallest value.
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*
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* ![](min.png)
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*
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* ## Examples
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* Get the minimal value of a series of numbers
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* ```ts
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* import { of } from 'rxjs';
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* import { min } from 'rxjs/operators';
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*
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* of(5, 4, 7, 2, 8).pipe(
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* min(),
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* )
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* .subscribe(x => console.log(x)); // -> 2
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* ```
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*
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* Use a comparer function to get the minimal item
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* ```typescript
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* import { of } from 'rxjs';
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* import { min } from 'rxjs/operators';
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*
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* interface Person {
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* age: number,
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* name: string
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* }
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* of<Person>(
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* {age: 7, name: 'Foo'},
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* {age: 5, name: 'Bar'},
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* {age: 9, name: 'Beer'},
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* ).pipe(
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* min<Person>( (a: Person, b: Person) => a.age < b.age ? -1 : 1),
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* )
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* .subscribe((x: Person) => console.log(x.name)); // -> 'Bar'
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* ```
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* @see {@link max}
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*
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* @param {Function} [comparer] - Optional comparer function that it will use instead of its default to compare the
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* value of two items.
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* @return {Observable<R>} An Observable that emits item with the smallest value.
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* @method min
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* @owner Observable
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*/
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export declare function min<T>(comparer?: (x: T, y: T) => number): MonoTypeOperatorFunction<T>;
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