maxBy | /collections/max_by.ts | std@0.196.0

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std/collections/max_by.ts>maxBy

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function maxBy

import { maxBy } from "https://deno.land/std@0.196.0/collections/max_by.ts";

maxBy<T>(array: Iterable<T>, selector: (el: T) => number): T | undefined

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

maxBy<T>(array: Iterable<T>, selector: (el: T) => string): T | undefined

maxBy<T>(array: Iterable<T>, selector: (el: T) => bigint): T | undefined

maxBy<T>(array: Iterable<T>, selector: (el: T) => Date): T | undefined

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@0.196.0/collections/max_by.ts";
import { assertEquals } from "https://deno.land/std@0.196.0/assert/assert_equals.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 });