@reactivex/rxjs/dist/es6/operator/max.js

Reactive Extensions for modern JavaScript

import { ReduceOperator } from './reduce';
/**
 * The Max operator operates on an Observable that emits numbers (or items that can be evaluated as numbers),
 * and when source Observable completes it emits a single item: the item with the largest number.
 *
 * <img src="./img/max.png" width="100%">
 *
 * @param {Function} optional comparer function that it will use instead of its default to compare the value of two
 * items.
 * @return {Observable} an Observable that emits item with the largest number.
 * @method max
 * @owner Observable
 */
export function max(comparer) {
    const max = (typeof comparer === 'function')
        ? comparer
        : (x, y) => x > y ? x : y;
    return this.lift(new ReduceOperator(max));
}
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