javascript 27 3d 27 operator shallow copy or deep copy

1// The '=' operator in javascript can serve the purpose of shallow vs
2// deep copy.
3
4// The '=' operator in javascript will assign deep copy to primitive 
5// data types. For example:
6let a = 10;
7let b = a;
8b = 4;
9console.log(a);
10// Output: 10
11console.log(b);
12// Output: 4
13
14
15// The '=' operator in javascript will assign shallow copies to
16// non-primitive data types. For example:
17let a = ['a','b','c','d','e','f','g'];
18let b = a;
19b.pop();
20console.log(a);
21// Output: ["a","b","c","d","e","f"]
22console.log(b);
23// Output: ["a","b","c","d","e","f"]

1/*
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5A deep copy means that all of the values of the new variable
6are copied and disconnected from the original variable. 
7A shallow copy means that certain (sub-)values are still connected
8to the original variable. To really understand copying,
9you have to get into how JavaScript stores values
10
11
12/*