Sadly, I always thought that the copy module was written in C. Sometimes I need to have a deep understanding of deepcopy. It is too simple to describe the document or refer to cloud.
For example, I have some questions about AttribDict's _ deepcopy _
Overview
Copy: Copy an object with the same content as the source object
The following two protocols are required to implement a copy
Nscopying
Nsmutablecopying
Copy returns the type of object
Basic JavaScript method of deep copy (shallow copy and deep copy), javascript depth
Preface
When it comes to deep copy, we must first mention the JavaScript data type. In the previous article, the basic JavaScript method-the data type is very clear,
1. Basic concepts:
First, we should know what deep copy and shallow copy are ).
A. Shallow copy Shadow Clone: only copies the basic type of the object. The object type still belongs to the original reference.B. Deep copy (deep copy): Copies the
Deep copy and shallow copy requires compliance with Nscopying, nsmutablecopying 2 protocolsWhat is the literal meaning of copycopy is "copy", "Copy", is a copy of the process common replication is: File copy function: The use of a source file to
The following is a deep, shallow copy defined in C + +
When you initialize another newly constructed object with a custom class type Object that has already been initialized, the copy constructor is automatically called. In other words, the
The purpose of copy syntax: When changing a copy, it does not affect the source object;Deep copy: A copy of the content that produces a new object. The new object counter is set to 1, and the source object counter is unchanged. Shallow copy: Pointer
1. Shallow copy vs deep copyThe copy in this article can also be referred to as a copy, which in this article is considered to be the same meaning of copy and copy. In addition, this article only discusses the replication of complex data types in JS
Direct I/O in LinuxIf an application can directly access network interface storage, the storage bus does not need to be traversed before the application accesses data. The overhead caused by data transmission is minimal. Applications or database
OA Credit disk source code to build qq1146616888 JS Copy method Jilin fast three source sale 1146616888.comJS has a deep copy and a shallow copy of two copies of the form, the following summary of common methods, convenient for normal work review
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