how to use the difference function from the underscore library in javascript

To use the difference function from the Underscore.js library in JavaScript, you first need to include the library in your project. You can do this by either downloading the library and including it as a script in your HTML file or by installing it using a package manager like NPM or Yarn.

Once you have Underscore.js included in your project, you can use the difference function to find the difference between two arrays. The difference function takes two or more arrays as arguments and returns an array containing the values from the first array that are not present in the other arrays.

Here's an example:

index.tsx
// import underscore library
const _ = require('underscore');

const array1 = [1, 2, 3, 4, 5];
const array2 = [3, 4, 5, 6, 7];

const differenceArray = _.difference(array1, array2);
// the differenceArray will contain [1, 2]
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In this example, we're using the _.difference function to find the difference between array1 and array2. Since array2 contains the values 3, 4, and 5, which are also present in array1, those values are excluded from the differenceArray, which contains only the values that are unique to array1.