09.js

// Replace empty strings in object with null values

// Write a function that takes an object as argument
// Some of the property values contain empty strings
// Replace empty strings and strings that contain only whitespace with null values
// Return the resulting object

function myFunction(obj) {
  //   for (let key in obj)
  //     (obj[key] === "" || obj[key] === " ") && (obj[key] = null);
  //   return obj;

  // AUTHOR'S:
  const newObj = { ...obj };
  for (key in newObj) {
    if (newObj[key].trim() === "") newObj[key] = null;
  }
  return newObj;
}

console.log(myFunction({ a: "a", b: "b", c: "" })); // { a: 'a', b: 'b', c: null }

console.log(myFunction({ a: "", b: "b", c: " ", d: "d" })); // { a: null, b: 'b', c: null, d: 'd' }

console.log(myFunction({ a: "a", b: "b ", c: " ", d: "" })); // { a: 'a', b: 'b ', c: null, d: null }