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

To use the compact function from the Underscore.js library in TypeScript, you will first need to install the Underscore.js library and include it in your project.

You can install Underscore.js using npm:

npm install underscore
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After installing the library, you can import the compact function from the library using the following TypeScript code:

index.ts
import { compact } from 'underscore';

const array = [0, 1, false, 2, '', 3];
const result = compact(array);

console.log(result); // Output: [1, 2, 3]
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In the above code, we import the compact function from the Underscore.js library and use it to remove all falsy values from the array.

The compact function returns a new array containing only the truthy values from the original array.

Note that the import statement assumes that your project is using ES modules. If you are using a different module system or a different version of TypeScript, you may need to adjust the import statement accordingly.