Module

std/collections/max_by.ts>maxBy

Deno standard library
Go to Latest
function maxBy
import { maxBy } from "https://deno.land/std@0.167.0/collections/max_by.ts";

Returns the first element that is the largest value of the given function or undefined if there are no elements.

Examples

Example 1

import { maxBy } from "https://deno.land/std@0.167.0/collections/max_by.ts";
import { assertEquals } from "https://deno.land/std@0.167.0/testing/asserts.ts";

const people = [
  { name: "Anna", age: 34 },
  { name: "Kim", age: 42 },
  { name: "John", age: 23 },
];

const personWithMaxAge = maxBy(people, (i) => i.age);

assertEquals(personWithMaxAge, { name: "Kim", age: 42 });

Parameters

array: readonly T[]
selector: (el: T) => number

Returns

T | undefined

Parameters

array: readonly T[]
selector: (el: T) => string

Returns

T | undefined

Parameters

array: readonly T[]
selector: (el: T) => bigint

Returns

T | undefined

Parameters

array: readonly T[]
selector: (el: T) => Date

Returns

T | undefined