enum class

1. Before the enumeration, we need some constants, for example, we want to use some constants to replace the order of several states, such as the orders have not been paid, the payment has not been shipped, shipped unconfirmed receipts, received non-

I just wrote a simple scheme interpreter in Python, and in Python we did the previous conversion engine for pattern matching and string processing. But the code structure itself is very dissatisfied, but the understanding of Python so that I can do

The most basic use of an enumeration class is to implement type-safe enumerations Enum class Direction {North , SOUTH, West, East } Kotlin Each enumerated constant is an object. Enumeration constants are separated by commas. Class Because each

In some cases, the object of a class is limited and fixed.such as the seasons on Earth, there are Four Seasons , that is, four objects .This example is a finite and fixed class , known as an enumeration class .In the early days, a simple static

1. Defining classesclass class Name { 0 to multiple constructor definitions ... 0 to multiple member variables ... 0 to multiple methods ...}1.1 Defining constructors[modifier] Constructor Name (parameter list ) {// constructor name

One, the scope is the constant of the classIn some cases, it is useful to make the scope of a symbolic constant a class. For example, a class declaration (not a definition) might use literal 30来 to specify the length of an array, because the

tags:c++ Note: In order to avoid all kinds of infringement issues, this article does not duplicate the original book arbitrary text (except the code, the author has declared that the code can be used). Readers who need the full Chinese translation

Another blog post for a single case pattern http://blog.csdn.net/nalanmingdian/article/details/77848079 single case design pattern application Scenario In some cases, the system requires only one instance. For example, a system has multiple print

Personal programming time, though not short, but the overall project experience is still relatively deficient, and the individual's programming style has not formed, in order to make their own programming more pleasing (not sad) recently saw Ali

------java training, Android training, iOS training,. NET training , look forward to communicating with you! -------Class loading, reflection, dynamic proxy, enumerationI. Loading of classesWhen a program wants to use a class, if the class has not

Why do you want to confuse code? Refer to: http://www.cnblogs.com/wangcan/p/3477840.html 1,android Studio 1.3 versions before!Used to think IntelliJ idea and Android studio in the Proguard-project.txt inside set up, in the compile time

In general, we use parcelable when we pass objects between activity. such as writing a class, on this class marked implements Parcelable and implementation interface can be used Intent.putextra (String, parcelable). For passing enum objects, it is

Http://apps.hi.baidu.com/share/detail/23749270 1. Definition of EnumEnum Fabric {Cotton = 1, silk = 2, wool = 4, rayon = 8, other = 128} 2. Conversion between symbol names and constant values Fabric Fab = fabric. cotton; int fabnum =

After a few days of completion, I finally moved the existing project from cocos2dx 2.2.2 to cocos2dx 3.2, and almost gave up 3.2. But at the last moment, I completed the completion. Cocos2dx 2. x to 3. X is a huge change, which can be regarded as

1 enum with scope scoped-enumerationI believe everyone has used the enumerator, all are non-scoped, in the header file defines the need to pay special attention to do not appear duplicate name. To solve this problem, C++11 provides an enumeration

Java supports enumerations starting with JDK1.5, that is, Java does not support enumeration at first, just like generics, which is a new feature added by JDK1.5. Usually a feature that is not provided at the beginning of the language development is

Android code obfuscation     1. Role of code obfuscationJava is a cross-platform and interpreted language. Java source code is compiled into a class file. Because of cross-platform requirements, Java bytecode contains a lot of source code

In the Framework 4.0 environmentMethoddefining enum ClassesDetermine if the enumeration class exists, and if so, the outputExample:Defined.QrCode.QrCodeType type; // Enum class if (! Enum.tryparse (AA, out type)) { context. Response.Write ("

This article mainly introduces the use of enum in PHP skills, interested in the reference of friends, I hope to help you. PHP actually has enum class library, need to install Perl extension, so it is not PHP standard extension, so the

Other auxiliary classes The helpers namespace contains more helper classes. Most helper classes are as simple as the randomhelper class. Traversing them is boring, so please review the auxiliary classes not mentioned in this chapter. If you want to