clone object without reference javascript
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Cloning Objects in JavaScript: A Deep Dive into Deep vs. Shallow Cloning
In JavaScript, cloning objects is a common task, but it's crucial to understand the nuances of how objects are copied. Simply assigning one object to another doesn't create a true independent copy; it creates a reference*. Modifying the "copy" will also modify the original. To truly duplicate an object, you need to *clone it. This tutorial will cover both shallow and deep cloning methods, their differences, and when to use each.
*Understanding the Problem: References vs. Values*
JavaScript distinguishes between primitive data types (strings, numbers, booleans, null, undefined, symbols, and BigInt) and objects (including arrays and functions).
*Primitive Data Types:* When you assign a primitive type to a new variable, the value is copied directly. Each variable holds its own independent copy of the data.
*Objects (including arrays):* When you assign an object to a new variable, you're not copying the object itself. Instead, you're copying the reference (memory address) of the object. Both variables now point to the same object in memory.
This behavior is why we need cloning techniques.
*Types of Cloning*
There are two primary types of object cloning:
1. *Shallow Cloning:* Creates a new object with a new memory address, but the properties of the new object still hold references to the original object's properties (if those properties are objects themselves). Primitive values are copied directly, but objects (nested objects, arrays) are referenced.
2. *Deep Cloning:* Creates a completely independent copy of the original object, including all nested objects and arrays. No references are shared between the original and the cloned object. Modifying the clone will never affect the original.
*Shallow Cloning Techniques*
Here are several common techniques for shallow cloning:
*1. Object.assign()*
The `Object.assign()` method copies ...
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