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

To use the matches function from the Underscore library in TypeScript, you first need to install both TypeScript and Underscore as dependencies in your project. You can do this using the following command:

npm install underscore @types/underscore --save-dev
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Once you have installed the dependencies, you can import the matches function from the Underscore library into your TypeScript file using the following code:

index.ts
import { matches } from 'underscore';
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The matches function allows you to create a function that performs a partial deep comparison between an object and a provided source object, returning true if the object has equivalent property values, else false.

Here is an example code snippet that uses the matches function to filter a list of objects based on a pattern:

index.ts
const words = [
  { word: 'apple', count: 2 },
  { word: 'banana', count: 3 },
  { word: 'cherry', count: 1 }
];

const pattern = { count: 2 };

const filteredWords = _.filter(words, matches(pattern));

console.log(filteredWords); // Output: [{ word: 'apple', count: 2 }]
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In this example, the matches function is used to create a function that filters the words array and returns a new array containing only the objects that match the pattern object. The resulting filteredWords array contains only one object with a count of 2, which matches the pattern object.