robocopy copy

The origin of object replication Why do objects have the concept of "copy", which is closely related to the way objects are transmitted in PHP5, let's take a look at this simple piece of code PHP Code * /** * * TV class * */ * Class Television * { * /** * * Screen height * */ * Protected $_screenlength = +; * * /** * * Screen width * */ * Protected $_screenhight = $; * * /** * * TV appearance color * */ *

This article mainly introduces the assignment, shortest, and deep copy methods in Python. Python also includes simple assignment, shortest, and deep copy methods, for more information about how to copy data, see the following methods in Python: Simple assignment, shallow copy, and deep

Any class in Java that implements the Cloneable interface can replicate a copy of itself and pass it to the caller by calling the Clone () method. Generally, the clone () method satisfies:(1) For any object x, there is X.clone ()!=x, that is, the cloned object is not the same object as the original object.(2) For any object x, there is X.clone (). GetClass () ==x.getclass (), that is, the Clone object is the same as the type of the original object.(3)

Both shallow and deep copies are only for complex objects such as Object, array,Difference: Shallow copy copies only the first-level properties of objects, deep copies can recursively replicate the properties of an objectIf an array element is a basic type, it will be copied, not affected, and if it is an object or an array, it will only copy objects and arrays of references, so that if we modify the old an

Copy the knowledge of constructor and value assignment function, and copy the constructor value assignment. /****************** There are two differences between the copy constructor and the value assignment operator overloading ******** *******************/ 1. Copy the constructor to generate a new class object, but

Deep copy and shallow copy in PythonThis article mainly introduces the deep copy and shallow copy in Python, this article explains the variables-object-Reference, Mutable object-immutable object, copy and so on. To get a clear copy