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1 | import { MonoTypeOperatorFunction } from '../types';
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2 | /**
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3 | * The Max operator operates on an Observable that emits numbers (or items that can be compared with a provided function),
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4 | * and when source Observable completes it emits a single item: the item with the largest value.
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5 | *
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6 | * ![](max.png)
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7 | *
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8 | * ## Examples
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9 | * Get the maximal value of a series of numbers
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10 | * ```ts
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11 | * import { of } from 'rxjs';
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12 | * import { max } from 'rxjs/operators';
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13 | *
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14 | * of(5, 4, 7, 2, 8).pipe(
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15 | * max(),
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16 | * )
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17 | * .subscribe(x => console.log(x)); // -> 8
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18 | * ```
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19 | *
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20 | * Use a comparer function to get the maximal item
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21 | * ```typescript
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22 | * import { of } from 'rxjs';
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23 | * import { max } from 'rxjs/operators';
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24 | *
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25 | * interface Person {
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26 | * age: number,
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27 | * name: string
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28 | * }
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29 | * of<Person>(
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30 | * {age: 7, name: 'Foo'},
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31 | * {age: 5, name: 'Bar'},
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32 | * {age: 9, name: 'Beer'},
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33 | * ).pipe(
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34 | * max<Person>((a: Person, b: Person) => a.age < b.age ? -1 : 1),
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35 | * )
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36 | * .subscribe((x: Person) => console.log(x.name)); // -> 'Beer'
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37 | * ```
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38 | *
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39 | * @see {@link min}
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40 | *
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41 | * @param {Function} [comparer] - Optional comparer function that it will use instead of its default to compare the
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42 | * value of two items.
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43 | * @return {Observable} An Observable that emits item with the largest value.
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44 | * @method max
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45 | * @owner Observable
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46 | */
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47 | export declare function max<T>(comparer?: (x: T, y: T) => number): MonoTypeOperatorFunction<T>;
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