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

To use the pickBy function from the lodash library in TypeScript, you would first need to install the library by running the following command in your terminal:

index.ts
npm install lodash
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Then, you can import the pickBy function in your TypeScript file and use it as follows:

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

interface Person {
  name: string,
  age: number,
  gender: string
}

const person: Person = {
  name: 'John',
  age: 25,
  gender: 'male'
}

const filteredPerson = _.pickBy(person, (value, key) => key !== 'age');

console.log(filteredPerson); // Output: { name: 'John', gender: 'male' }
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In this example, we imported the lodash library using the * as _ syntax which allows us to alias the imported library as _. We defined an interface Person representing an object with name, age, and gender properties. We then created an object person of type Person with values for each of these properties.

We used the pickBy function by passing our person object as the first argument and a predicate function as the second argument. The predicate function specifies that we want to pick all properties from the person object where the key is not equal to 'age'. The filteredPerson object only contains the name and gender properties from the person object.

Finally, we used the console.log() function to log the filteredPerson object to the console.