RxJS - Mathematical Operator Min

min() method will take in an observable with all values and return an observable with the min value. It takes in a compare function as an argument, which is optional.

Syntax

min(comparer_func?: number): Observable

Parameters

comparer_func − (optional). A function that will filter the values to be considered for min value from the source observable.If not provided the default function is considered.

Return value

The return value is an observable that will have the min value.

Example 1

import { of } from 'rxjs';
import { min } from 'rxjs/operators';

let list1 = [1, 6, 15, 10, 58, 2, 40];
let final_val = of(1, 6, 15, 10, 58, 2, 40).pipe(min());

final_val.subscribe(x => console.log("The Min value is "+x));

Output

The Min value is 1

Example 2

import { of ,from} from 'rxjs';
import { min } from 'rxjs/operators';

let list1 = [1, 6, 15, 10, 58, 2, 40];
let final_val = from(list1).pipe(min((a,b) => a - b));
final_val.subscribe(x => console.log("The Min value is "+x));

Output

The Min value is 1