Function for deep copying objects and arrays - cloneObject()

README.md

Function for deep copying objects and arrays - cloneObject()

object-deep-copy.js

// Function takes 1 argument which is either an array or an object
function cloneObject(arrayOrObject) {
  let copy;
  
  // If the argument is an array, set the value `copy` to be an empty array 
  if (Array.isArray(arrayOrObject)) {
  	copy = [];
  } else {
  // Else if the argument is not an array, set the value `copy` to be an empty object
    copy = {};
  }
   
  // Loop over the array or object argument and get every key
    for(let key in arrayOrObject) {
        // If the property is an object or array, recursively call the function again
	// passing that object or array as it's argument
        if(typeof(arrayOrObject[key]) === "object" && arrayOrObject[key] !== null ){
            copy[key] = cloneObject(arrayOrObject[key]);
        } else {
	// Else if the value is a primitive, copy the value by assinging it with `=` to the `copy` object/array 
            copy[key] = arrayOrObject[key];
        }
    }
    return copy;
}

let original = {
	name: 'Sarah',
	age: 35,	
	family: [
    	  { name: 'Mark', age: 29 },
    	  { name: 'Linda', age: 33 }
	] 
}

let clonedObject = cloneObject(original);

console.log(original);
console.log(clonedObject);