how to use the reduceright function from the underscore library in typescript

To use the reduceRight function from the Underscore library in TypeScript, you first need to install the Underscore library. You can do this either through npm or by downloading the library directly and including it in your project.

Once you have the Underscore library installed in your project, you can use the reduceRight function to reduce an array from right to left. Here's an example:

index.ts
import * as _ from 'underscore';

const array = [1, 2, 3, 4, 5];
const sum = _.reduceRight(array, (prev, curr) => prev + curr);

console.log(sum); // Output: 15
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In the code above, we import the Underscore library with the wildcard operator (*). We then create an array of numbers (array) and pass it to the reduceRight function, along with a callback function that takes two arguments (prev and curr) and returns the sum of these two numbers.

The reduceRight function applies this callback function to each element in the array, starting from the right and moving left. It then returns the final accumulated result of the reduction, which is the sum of all the numbers in the array.

Note that in order to use the reduceRight function with TypeScript, you need to import the Underscore library with the correct typings. You can do this by installing the @types/underscore package through npm, or by including the typings file for Underscore in your project.