자바스크립트 객체 비구조화: 고급 할당 패턴

            const person = {
  firstName: "Alice",
  lastName: "Smith",
  age: 30
};

const { firstName, lastName } = person;

console.log(firstName); // Output: Alice
console.log(lastName);  // Output: Smith

            

              
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            const person = {
  firstName: "Alice",
  lastName: "Smith",
  age: 30
};

const { firstName: givenName, lastName: familyName } = person;

console.log(givenName); // Output: Alice
console.log(familyName);  // Output: Smith

            

              
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            const apiResponse = {
  product_id: 123,
  product_name: "Example Product",
  product_price: 25.99
};

const { product_name: productName } = apiResponse;

console.log(productName); // Output: Example Product

            

              
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            const person = {
  firstName: "Alice"
};

const { firstName, lastName = "Doe" } = person;

console.log(firstName); // Output: Alice
console.log(lastName);  // Output: Doe

            

              
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            const config = {
  apiUrl: "https://example.com/api"
};

const { apiUrl, timeout = 5000 } = config;

console.log(apiUrl);  // Output: https://example.com/api
console.log(timeout); // Output: 5000

            

              
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            const person = {
  firstName: "Alice",
  lastName: "Smith",
  address: {
    street: "123 Main St",
    city: "Anytown",
    country: "USA"
  }
};

const { address: { city, country } } = person;

console.log(city);    // Output: Anytown
console.log(country); // Output: USA

            

              
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            const person = {
  firstName: "Alice",
  lastName: "Smith",
  address: {
    street: "123 Main St",
    city: "Anytown",
    country: "USA"
  }
};

const { address, address: { city, country } } = person;

console.log(city);    // Output: Anytown
console.log(country); // Output: USA
console.log(address); // Output: { street: '123 Main St', city: 'Anytown', country: 'USA' }

            

              
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            const config = {
  database: {
    host: "localhost",
    port: 5432,
    credentials: {
      username: "admin",
      password: "secret"
    }
  }
};

const { database: { credentials: { username, password } } } = config;

console.log(username); // Output: admin
console.log(password); // Output: secret

            

              
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            const person = {
  firstName: "Alice"
};

const { lastName: familyName = "Doe" } = person;

console.log(familyName); // Output: Doe

            

              
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            const person = {
  firstName: "Alice",
  lastName: "Smith",
  age: 30,
  city: "Anytown",
  country: "USA"
};

const { firstName, lastName, ...rest } = person;

console.log(firstName); // Output: Alice
console.log(lastName);  // Output: Smith
console.log(rest);      // Output: { age: 30, city: 'Anytown', country: 'USA' }

            

              
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            const formData = {
  name: "John Doe",
  email: "john.doe@example.com",
  address: "123 Main St",
  city: "Anytown",
  country: "USA",
  newsletter: true
};

const { name, email, ...otherData } = formData;

console.log(name);      // Output: John Doe
console.log(email);     // Output: john.doe@example.com
console.log(otherData); // Output: { address: '123 Main St', city: 'Anytown', country: 'USA', newsletter: true }

            

              
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const myKey = 'dynamicProp';
const myObject = { dynamicProp: 'Hello' };

// This will NOT work as expected
// const { [myKey]: value } = myObject; // SyntaxError: Unexpected token '['

// Instead, pre-define the dynamic property for access
const dynamicValue = myObject[myKey];
console.log(dynamicValue); // Outputs: Hello

            

              
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            function greet({ firstName, lastName }) {
  console.log(`Hello, ${firstName} ${lastName}!`);
}

const person = {
  firstName: "Alice",
  lastName: "Smith"
};

greet(person); // Output: Hello, Alice Smith!

            

              
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            function greet({ firstName: name, city = "Unknown" }) {
  console.log(`Hello, ${name} from ${city}!`);
}

const person = {
  firstName: "Alice"
};

greet(person); // Output: Hello, Alice from Unknown!

            

              
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            function UserProfile({ name, email, avatarUrl = "/default-avatar.png" }) {
  return `
    

      
      
${name}
      
Email: ${email}
    
  `;
}

const user = {
  name: "Bob Johnson",
  email: "bob.johnson@example.com"
};

console.log(UserProfile(user));

            

              
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            const student = {
  name: "Carlos Rodriguez",
  grades: [90, 85, 92]
};

const { name, grades: [grade1, grade2, grade3] } = student;

console.log(name);    // Output: Carlos Rodriguez
console.log(grade1);  // Output: 90
console.log(grade2);  // Output: 85
console.log(grade3);  // Output: 92

            

              
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            const locationData = {
  city: "London",
  coordinates: [51.5074, 0.1278] // [latitude, longitude]
};

const { city, coordinates: [latitude, longitude] } = locationData;

console.log(city);       // Output: London
console.log(latitude);   // Output: 51.5074
console.log(longitude);  // Output: 0.1278

            

              
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            const product = {
  id: 1,
  name: "Laptop",
  description: "A powerful laptop",
  price: 1200
};

const { name, price } = product; // Ignoring 'id' and 'description'

console.log(name);  // Output: Laptop
console.log(price); // Output: 1200

            

              
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