08.js

// Extracting information from objects

// Write a function that takes an object as argument containing properties with personal information
// Extract firstName, lastName, size, and weight if available
// If size or weight is given transform the value to a string
// Attach the unit cm to the size
// Attach the unit kg to the weight
// Return a new object with all available properties that we are interested in

function myFunction(obj) {
  //   const { fn, ln, size, weight, ...rest } = obj;
  //   const newObj = { fn, ln };
  //   if (size) newObj.size = `${size}cm`;
  //   if (weight) newObj.weight = `${weight}kg`;
  //   return newObj;

  //AUTHOR'S:
  return {
    fn: obj.fn,
    ln: obj.ln,
    ...(obj.size && { size: `${obj.size}cm` }),
    ...(obj.weight && { weight: `${obj.weight}kg` }),
  };
}

console.log(
  myFunction({ fn: "Lisa", ln: "Müller", age: 17, size: 175, weight: 67 })
); // {fn: 'Lisa', ln: 'Müller', size: '175cm', weight: '67kg'}

console.log(
  myFunction({
    fn: "Martin",
    ln: "Harper",
    age: 26,
    email: "martin.harper@test.de",
    weight: 102,
  })
); // {fn: 'Martin', ln: 'Harper', weight: '102kg'}

console.log(
  myFunction({ fn: "Andrew", ln: "Harper", age: 81, size: 175, weight: 71 })
); // {fn: 'Andrew', ln: 'Harper', size: '175cm', weight: '71kg'}

console.log(
  myFunction({
    fn: "Matthew",
    ln: "Müller",
    age: 19,
    email: "matthew@mueller.de",
  })
); // {fn: 'Matthew', ln: 'Müller'}