how to use the select function from the underscore library in typescript

Underscore.js is a utility library for JavaScript that provides a lot of useful methods for working with collections, arrays and objects. One of the methods provided by Underscore.js is the select function, which is used to filter a collection based on a given predicate function.

In order to use the select function from Underscore.js in TypeScript, you first need to install the library:

index.ts
npm install underscore
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Then, you can import the select function from the underscore module:

index.ts
import { select } from 'underscore';
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The select function takes two parameters: the collection to filter, and the predicate function to use for filtering.

Here's an example of how to use the select function in TypeScript:

index.ts
import { select } from 'underscore';

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

const people: Person[] = [
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 30 },
  { name: 'Charlie', age: 35 },
];

const filteredPeople = select(people, person => person.age < 30);

console.log(filteredPeople); // [{ name: 'Alice', age: 25 }]
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In this example, we're using the select function to filter the people array based on the age property of each person. The predicate function returns true for people with an age less than 30, so the resulting array contains only Alice.