how to use the mapvalues function from lodash in javascript

The mapValues function from the Lodash library allows you to map over the values of an object and change them according to a function you define. The resulting object will have the same keys as the original object, but with the mapped values. Here's an example:

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

const obj = {
  a: 1,
  b: 2,
  c: 3
};

const mappedObj = _.mapValues(obj, value => value * 2);

console.log(mappedObj); // { a: 2, b: 4, c: 6 }
176 chars
12 lines

In this example, we require Lodash and define an object with three keys and values. We then use mapValues to map over the values of this object and multiply each value by 2. The resulting object is logged to the console.

Note that mapValues works on objects, not on arrays. If you want to map over the elements of an array, you can use the map function instead.

index.tsx
const array = [1, 2, 3];

const mappedArray = array.map(value => value * 2);

console.log(mappedArray); // [2, 4, 6]
117 chars
6 lines

This is a regular map function on an array. The resulting array contains the mapped values of the original array.