how to use the functions function from the underscore library in javascript

The underscore.js library provides a number of utility functions that make working with arrays, objects, and functions easier in JavaScript. One such utility is the functions function, which returns an array of all the function names (methods) found on an object.

Here's an example of how to use the functions function from the underscore library:

index.tsx
// require the underscore library (make sure it is installed first)
var _ = require('underscore');

// define an object with some methods
var car = {
  make: 'Toyota',
  model: 'Corolla',
  year: 2020,

  // some methods
  drive: function() {
    console.log("Driving...");
  },
  park: function() {
    console.log("Parking...");
  }
};

// get an array of the function names
var methodNames = _.functions(car);

// output the array of function names
console.log(methodNames); // => ["drive", "park"]
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In this example, we use the functions function to get an array of the names of the methods defined on the car object (i.e. "drive" and "park"). The console.log statement then outputs this array to the console.

By using this function, we can easily create higher-order functions that work with objects and their methods, making our code more functional, modular and reusable.