how to use the constant function from lodash in javascript

To use the constant function from lodash in Javascript, first, you need to import it using either of the following methods:

index.tsx
//Method 1: Using Node.js require method
const constant = require('lodash/constant');

//Method 2: Using ES6 imports
import constant from 'lodash/constant';
157 chars
6 lines

The constant function returns a function that always returns a given value, regardless of the parameters passed to it. The single argument passed to constant is the value to be returned.

Here's an example:

index.tsx
const lodash = require('lodash');

const alwaysFour = lodash.constant(4); //creating a function that always returns 4

console.log(alwaysFour()); //Output: 4
console.log(alwaysFour(10)); //Output: 4
console.log(alwaysFour({a: 1, b: 2})); //Output: 4
250 chars
8 lines

In the example above, the constant function is used to create a new function called alwaysFour that always returns the number 4. The output of calling alwaysFour with different arguments, as shown, is always 4.