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How to deep clone an object without circular references?
I have copied the function below from an existing answer by Dmitriy Pichugin. This function can deep clone an object without any circular references- it works.
How to clone an array of objects in JavaScript?
Deep will go as deep as it can go, and if you’ve got a circle, it’ll keep going infinitely until the browser faints. If the data structure cannot be represented as a directed acyclic graph, then I’m not sure you’re going to be able to find an all-purpose method for deep cloning.
What’s the best way to clone an object?
Let’s clone our object using spread: So we changed our cloned object by changing the city. Let’s see the output. A shallow copy means the first level is copied, deeper levels are referenced. As you can see, the deep copy is a true copy for nested objects. Often time shallow copy is good enough, you don’t really need a deep copy.
What happens if I try to clone a function?
If you try to cache it after creating the copy, it will not be cached by the time it will be recursively referenced again (and thus the call stack error). Additionally, there’s no sense in cloning a function so just return that back out.
What’s the difference between shallow copy and deep copy?
There are two types of copying reference data types namely shallow copy and deep copy. A shallow copy simply points to the reference address of the original collection structure (object or array) which holds the value in the new variable i.e., only the collection structure is copied, not the element.
Which is the best deep copy library in JavaScript?
Custom Function — It is pretty easy to write a recursive JavaScript function that will make a deep copy of nested objects or arrays. 5. rdfc — For the best performance, the library rfdc (Really Fast Deep Clone) will deep copy about 400% faster than lodash’s _.cloneDeep.
How to deep copy an array in JavaScript?
In JavaScript, array and object copy change the origin values, so Deep copy is the solution for this. A deep copy means actually creating a new array and copying over the values, since whatever happens to it will never affect the origin one. JSON.parse and JSON.stringify is the best and simple way to Deep copy.