how to use the invertby function from the lodash library in typescript

To use the invertBy function from the lodash library in TypeScript, you will need to first import it from the library. Here's an example:

index.ts
import { invertBy } from 'lodash';

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

const invertedObject = invertBy(originalObj);

console.log(invertedObject); // Output: { '1': [ 'a', 'c' ], '2': [ 'b' ] }
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In the above example, we import the invertBy function from the lodash library. We then define an object originalObj with three properties with different values.

We then call the invertBy function on the originalObj object which returns an object with values as keys and keys as values. We store the result in a variable invertedObject.

Finally, we log the invertedObject object to the console which returns an object in which keys '1' and '2' contain the corresponding properties from the original object.

Note that the invertBy method relies on the toString() method to determine the key for the inverted output values.