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

To use the hasin function from the Lodash library in TypeScript, first, install the Lodash library by running the following command:

npm install --save lodash
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Then, import the hasin function from the Lodash library into your TypeScript file by adding the following import statement:

index.ts
import { hasIn } from 'lodash';
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You can use the hasin function to check if a property exists deeply in an object or not. Here is an example code snippet:

index.ts
interface Person {
  name: string;
  address: {
    city: string;
    state: string;
  };
}

const person: Person = {
  name: 'John',
  address: {
    city: 'New York',
    state: 'NY',
  },
};

if (hasIn(person, 'name') && hasIn(person, 'address.city')) {
  console.log(`Person's name is ${person.name} and they live in ${person.address.city}.`);
} else {
  console.log(`Person's name or address.city property does not exist.`);
}
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In this example, we are checking if the name and address.city properties exist in the person object using the hasin function. If both properties exist, we log the name and city to the console. Otherwise, we log a message indicating that one or both properties do not exist.

Note that we are using TypeScript's type annotations to define the Person interface, which specifies the shape of the person object. This helps us catch potential errors at compile-time and provides better IDE support.