When you declare an enum, by default each enumerated value is represented internally with an int. (System.Int32 - 4 bytes). You can convert between values of the underlying type and enum values using an explicit cast. Because an enum is represented b…
You can convert to an enum value from its underlying type by casting the underlying type (e.g. int) to the enum type. However, when you cast a value that doesn't have a corresponding enumerator in the type, you don't get any sort of error. In the exa…
原帖地址:http://blog.csdn.net/zfrong/article/details/7332545 Android xml资源文件中@.@android:type.@*.?.@+引用写法含义以及区别 一.@代表引用资源 1.引用自定义资源.格式:@[package:]type/name android:text="@string/hello" 2.引用系统资源.格式:@android:type/name android:textColor="@android:c…
原文 关于C#你应该知道的2000件事 下面列出了迄今为止你应该了解的关于C#博客的2000件事的所有帖子. 帖子总数= 1,219 大会 #11 -检查IL使用程序Ildasm.exe d #179 - 什么是大会? #180 - CLR按需加载程序集 #485 - 项目参考和附属组件 #486 - 忽略不必要的项目引用 #705 - 应用程序和类库 #706 - 应用程序域启用应用程序隔离 基本 #1 - Main()签名的样子 #2 - 最小的C#程序 #3 - 谁设计了C#? #4 -…
Mojo C++ Bindings API This document is a subset of the Mojo documentation. Contents Overview Getting Started Interfaces Basic Usage InterfacePtr and InterfaceRequest Creating Interface Pipes Binding an Interface Request Receiving Responses Connection…
Part 45   C# Tutorial   Why Enums Enums are strongly typed constants. If a program uses set of integral numbers, consider replacing them with enums. Otherwise the pragram becomes less Readable Maintainable Part 46   C# Tutorial   Enums Example public…
Advantage Disadvantage Enum types Clarity Safety Ease of maintenance. None extensibility Typesafe enum pattern(Interfaces to emulate extensible enums) Extensibility No good way to enumerate all of the elements of a base type and its extension. Extens…
FB01与F-02的区别(转载) FB01 : a) ''Post Document'' b) No doc type as SA automatically comes. c) No automatic posting key population as 40 F-02 a) ''Enter GL account Posting'' b) Doc type = SA c) Posting key = 40 Ofcourse these (b and c) can be over written…
在程序开发中,有时候需要值类型也为可空类型,比如,在数据库中,我们可以把一个日期Datetime设置为null. 在C# 2.0中就出现了可空类型,允许值类型也可以为空(null),可空类型的实现基于C#泛型. 可空类型基本知识 可空类型的核心是System.Nullable<T>,同时静态类System.Nullable为可空类型提供了很多实用的方法.下面分别看看可空类型的这两个重要组成部分. System.Nullable<T> 通过ILSpy我们可以查看这个类型的C#代码:…
转自:http://www.cnblogs.com/codingmylife/archive/2013/05/31/3110656.html   从C系语言过来用Python,好不容易适应了写代码不打花括号,突然有一天发现它居然木有枚举……于是stackoverflow了一把,发现神人的枚举(enum)实现到处都是,于是汉化总结过来. 如果是新版Python用户(Python 3.4 with PEP 435): 1 2 from enum import Enum Animal = Enum('…