30-seconds-of-code/snippets/find-last.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Find last matching value	snippet	array	misty-mountains	2020-10-22T20:23:47+03:00

Finds the last element for which the provided function returns a truthy value.

• Use Array.prototype.filter() to remove elements for which fn returns falsy values.
• Use Array.prototype.pop() to get the last element in the filtered array.

const findLast = (arr, fn) => arr.filter(fn).pop();

findLast([1, 2, 3, 4], n => n % 2 === 1); // 3