const obj = { name: 'John', age: 30, email: 'john@example.com' }; const keys = _.keys(obj); console.log(keys); // ['name', 'age', 'email']
const user = { id: 1, firstName: 'Jane', lastName: 'Doe', email: 'jane@example.com' }; const getUserInfo = (user) => { const keys = _.keys(user).join(', '); return `User info: ${keys}`; }; console.log(getUserInfo(user)); // User info: id, firstName, lastName, emailThis example shows how the `_.keys()` function can be used in combination with other JavaScript concepts, such as arrow functions and string interpolation, to format a user's information in a human-readable way. Summary: The `_.keys()` function is a powerful utility provided by the underscore.js library that enables developers to extract all of the keys of an object and store them in an array. This function can be used in a variety of ways to manipulate and format data in JavaScript applications.