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Is there a read-only generic dictionary available in .NET?

...lt;TKey, TValue> { private readonly IDictionary<TKey, TValue> _dictionary; public ReadOnlyDictionary() { _dictionary = new Dictionary<TKey, TValue>(); } public ReadOnlyDictionary(IDictionary<TKey, TValue> dictionary) { _dictionary = dict...
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Why unsigned integer is not available in PostgreSQL?

I came across this post ( What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL? ) and realized that PostgreSQL does not support unsigned integer. ...
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How to merge lists into a list of tuples?

... In Python 2: >>> list_a = [1, 2, 3, 4] >>> list_b = [5, 6, 7, 8] >>> zip(list_a, list_b) [(1, 5), (2, 6), (3, 7), (4, 8)] In Python 3: >>> list_a = [1, 2, 3, 4] >>> list_b = [5, 6, 7, 8] >>> list(zi...
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C++ 11特性 - 专题 - 清泛网 - 专注IT技能提升

c++11新特效,及高效使用方法。
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MFC Telnet Application(mfc telnet 端口,代码实现、不调用telnet.exe) ...

...调用telnet.exe。程序源码工程升级后,可能出现编译不过情况,请将stdafx.h中0x0410全部改为0x0501即可。The article demonstrates an MFC GUI Telnet application with server capabilities for incoming connections support. Download demo - 29.9 KB Download source - 42....
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控件不响应OWNERDRAW消息 - C/C++ - 清泛网 - 专注C/C++及内核技术

... .... } } 中自绘不生效,调用CListCtrlRedrawItem后不触发OnDrawItem函数。 这是由于没有设置自绘项,设置方法如下: 控件右键“属性”: OWNERDRAW 消息
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error MSB6006: “cmd.exe”已退出,代码为 3 - C/C++ - 清泛网 - 专注C/C++及内核技术

...台电脑上使用cmake编译后拷贝到另一台电脑上,但是cmake路径与原电脑不一致从而导致以上错误。 解决方法:新电脑上重新使用cmake生成一次工程文件即可解决。error MSB6006 cmake
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error C2440: \'initializing\' : cannot convert from \'char *\' to \'co...

...用string::const_iterator 后者使用下标操作来获取string对象中字符。 error C2440
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error C2440: “return”: 无法从“const Screen”转换为“Screen &” - C/...

...办法: c++语言规定,不能从const成员函数返回指向类对象普通引用,const成员函数只能返回*this作为一个const引用。因此解决办法即是,把成员函数声明为 const Screen& display(std::ostream &os) const; error C2440 const
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ifstream 线程安全读文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

...std::istream逐个读取它们要快。 //以这种方式使用streambuf代码必须由sentry对象保护。 // sentry对象执行各种任务,如线程同步和更新流状态。 std::istream::sentry se(is, true); std::streambuf* sb = is.rdbuf(); for(;;) { int...