In this example, the getUser() function returns an object with multiple properties, including a nested address object. Using destructuring assignment, we can extract the name , age , street , and city properties into separate variables in a single statement.
Destructuring assignment also allows you to specify default values for variables: javascript the definitive guide 8th edition pdf
Furthermore, the eighth edition serves as a vital corrective to the often shallow learning paths offered by modern bootcamps and quick-start guides. It treats JavaScript with the seriousness of a systems language, documenting its standard library and low-level APIs with a precision that empowers engineers to build their own tools rather than just consuming the tools of others. It acknowledges the reality of the modern ecosystem by including substantial coverage of Node.js, recognizing that JavaScript is no longer confined to the browser. This dual coverage creates a "full-stack" literacy that is essential for the contemporary developer. In this example, the getUser() function returns an
const [x, y, z = 10] = [1, 2]; console.log(x); // 1 console.log(y); // 2 console.log(z); // 10 It treats JavaScript with the seriousness of a
const name, age = name: 'John', age: 30 ; console.log(name); // John console.log(age); // 30