how to use the findlastindex function from the lodash library in typescript

To use the findLastIndex function from lodash in TypeScript, you must have the lodash library installed in your project. You can install it using npm or yarn:

# npm
npm install --save lodash

# yarn
yarn add lodash
56 chars
6 lines

Once installed, you can import the findLastIndex function from lodash and use it in your TypeScript code:

index.ts
import { findLastIndex } from 'lodash';

const array = [1, 2, 3, 4, 5];

const index = findLastIndex(array, (n) => n > 3);

console.log(index); // Output: 3
157 chars
8 lines

In the example above, we imported the findLastIndex function from lodash, created an array of numbers, and used the findLastIndex function to find the index of the last element that is greater than 3. The findLastIndex function takes two arguments: the array to search and a predicate function that is invoked for each element in the array. The predicate function should return a truthy value for elements that match the condition you are looking for.

The findLastIndex function returns the index of the last element that satisfies the condition, or -1 if no element matches the condition.