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

Here's an example of how to use the assignin function from the Lodash library in TypeScript:

index.ts
import * as _ from 'lodash';

interface MyInterface {
  name: string;
  age: number;
}

const myObj: MyInterface = { name: 'John' };
_.assignin(myObj, { age: 30 });
console.log(myObj); // Output: { name: 'John', age: 30 }
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In the code above, we import Lodash with the import * as _ from 'lodash'; statement. Then we define an object literal myObj with an initial name property. We use the assignin function from Lodash to merge myObj with a second object literal that has an age property. Finally, we log the merged object to the console to verify the result.

Note that in TypeScript we define an interface MyInterface to enforce type checking of the properties of our custom objects for better type safety.