findIndex

This method is like find except that it returns the index of the first element predicate returns truthy for instead of the element itself.

API

function findIndex<T>(
	arr: T[],
	predicate: (value: T, index: number, obj: T[]) => unknown
): number;

Usage

import { findIndex } from "@feedzai/js-utilities";

const users = [
 { user: 'barney', age: 36, active: true },
 { user: 'fred', age: 40, active: false },
 { user: 'pebbles', age: 1, active: true },
]

findIndex(users, o => o.age >= 40)