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DEEP COPY OF A OBJECT IN JAVASCRIPT IN A GOOD WAY


 so suppose i have a object which contain 2 values one x and other y


let point={x:100,y:200};

now i wld try to copy this object to a another object


let other=point;


 if i change other array value it would changes the point array to like this

other.x=500;

console.log(point.x);
console.log(other.x);


that not what we want the reason behind this both variable referencing towards same memory address.

 in c++ we have three options 
    1. we can pass variable by value that would create a new copy
    2. by reference same as above 
        3. by pointer like reference by not automatic memory release after use you have to delete the variable


so how i do a deep copy in javascript so it can be applied to the complex structures here is my method for that


deep copy of a object

code below

let parentObject={
  name:"manish",
  sal:"9000000",
  others:{
      manager:"abc",
      age:45,
      what:{
        arr:[1,2,3,4]
      } 
  }
}

Object.prototype.deepCopy=function(x)
{
    for(let [key,value] of Object.entries(this))
    {
     
        if(typeof value==="object")
        {
            x[key]=new Object();
            value.deepCopy(x[key])
        }else
        {
           x[key]=value;
        }
     
    }
    return x;
    
}


var deepCopyObject=parentObject.deepCopy(new Object());
deepCopyObject.name="oops";
console.log(deepCopyObject);
console.log(parentObject);

as you see i changed deepCopyObject name propetry but its does not change the parentObject name


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