DeepFreezeObjectRecursive

DeepFreezeRecursiveAlgorithm.js

const sampleObject = {
  author: "J.R.R. Tolkien",
  genre: "Sci-Fi/Fantasy",
  birthday: "January 3, 1892",
  books: [
    {
      title: "The Silmarillion",
      publicationDate: 1927
    },
    {
      title: "The Hobbit",
      publicationDate: {
        uk: 1945,
        us: 1946
      }
    },
    {
      title: "The Fellowship of the Ring"
    },
    {
      title: "The Two Towers"
    },
    {
      title: "The Return of the King"
    }
  ]
}

// deepFreezeObj Function
  // Base Case: Check to see if the type of input is not an object
  // Recursive: If inputObj at this point is still an object
    // Call deep freeze object



const deepFreezeObj = inputObj => {
  if (typeof inputObj !== 'object') return;
  // console.log(Object.values(inputObj));
  Object.values(inputObj).forEach( item => {
    // console.log('Item: ', item);
    deepFreezeObj(item);
  });
  Object.freeze(inputObj);
}

// deepFreezeObj(sampleObject);



console.log("INITIAL" + JSON.stringify(sampleObject, null, 4));

Object.freeze(sampleObject);

sampleObject.author = "JK Rowling";
sampleObject.books[1].publicationDate.uk = 1999;

console.log("FINAL" + JSON.stringify(sampleObject, null, 4));