Javascript fundamentals

<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<div>
    <h1>Copy array</h1>
 
    <script>
        $(document).ready(function () {

            var array = [1, 2, 3, 4, 5];
            var array1 = [6, 7, 8];

            var arra2 = [1, 2, 3, 3, 4, 5]; var arra4 = [3, 3];
            var arra3 = [3, 3, 5];
           
            //remove all occurances of 3 from arra2
            //output will be [1,2,4,5]

            function unique(arra2) {
                var result = [];
                $.each(arra2, function (i, e) {
                    if ($.inArray(e, arra4) == -1) result.push(e);
                });
                return result;
            }
            console.log(unique(arra2));
            //------------------------------------------------------------------//
            //remove arra3 elements from arra2
            //output like [1,2,4]

            var newFileredArray = [];
            arra2.filter(function (e, i) { //e= element i= index
                if ($.inArray(e, arra3) == -1) {
                  newFileredArray.push(e);
                }
                return newFileredArray;
            });

            console.log(newFileredArray);

   //------------------------------------------------------------------//

            //remove 3 from array
            var index = array.indexOf(3);
            array.splice(index,1);
            console.log(array);

   //------------------------------------------------------------------//
            //copy array by slice
            var newArray = array.slice(0); //copy array by using slice, starting from 0
            console.log(newArray);

   //------------------------------------------------------------------//
            //if i want to take [1,2,3] from original array
            //can we take by using slice() method
            var newArray1 = array.slice(0,3); //copy array by using slice, starting from 0
            console.log(newArray1);
   //------------------------------------------------------------------//
            //copy array by using ...
            var newArray1 = [...array]
            console.log(newArray1);
   //------------------------------------------------------------------//
            //creating new object of same array. If change new object 0 index value to 10. It does not effect to original
            //array 0 index value
            var array1 = Object.assign({}, array);
            array1[0] = 10;
            console.log(array1[0]);
            console.log(array[0]);
            console.log(array1);
   //------------------------------------------------------------------//
            //combined result of one or more array
            var combineArray = [...array, ...array1]
            console.log(combineArray);
   //------------------------------------------------------------------//
            //object creation in javascript
            var Person = { Id: 1, Name: 'Ashish', Address: 'Chandigarh' };
            console.log(Person.Id + " " + Person.Name);
   //------------------------------------------------------------------//
            //another way of creating object in javascript
            var obj = new Object();
            obj.Id = 101;
            obj.Name = "Aakash";
            console.log(obj.Id + " " + obj.Name);
   //------------------------------------------------------------------//
            //deep copy is point to same reference copy of an object. If any property values is changed into new variable then original object
            //properties values are also changed.
            var deepCopy = Person;
            deepCopy.Name = "Kumar Verma";
            console.log(deepCopy.Id + " " + deepCopy.Name);
            console.log(Person.Id + " " + Person.Name);
   //------------------------------------------------------------------//
            //shallow copy is created by using Object.Create() method. It will create new object with same property name and
            //values but if changed any property values of newly created object then it does not effect on Original object
            //properties values
         
            var shallowCopy = Object.create(Person);
            shallowCopy.Name = "Kumar Verma";
            console.log(shallowCopy.Id + " " + shallowCopy.Name);
            console.log(Person.Id + " " + Person.Name);

   //------------------------------------------------------------------//
            //Object.assign is used to combine both object values into new object
            var persons = { Id: 101, Name: 'Radha' };
            var person1 = { Name: 'Ashish Kumar Verma' };
            var newObj = Object.assign({}, persons, person1);
            console.log(newObj.Id + " " + newObj.Name);
        });
    </script>
</div>