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C# - Recommendations for Abstract Classes vs. Interfaces
?? The choice of whether to design your functionality as an interface or an abstract class can sometimes be a difficult one. An abstract class is a class that cannot be instantiated, but must be inh...
分类:Windows程序   时间:2014-10-29 17:15:46    阅读次数:238
C# - Abstract Classes
?? Abstract classes are closely related to interfaces. They are classes that cannot be instantiated, and are frequently either partially implemented, or not at all implemented. One key difference bet...
分类:Windows程序   时间:2014-10-29 14:49:03    阅读次数:180
the process cannot access the file because it is being used by another process
当在IIS中修改绑定的端口号后启动时遇到如下错误,表明你的端口号已经被占用了 使用netstat -ano这个指令查看本地端口占用情况,换一个没有被占用的端口即可。 ??...
分类:数据库   时间:2014-10-29 13:03:17    阅读次数:176
Property cannot be found on forward class object?
I have a UIView and I'm trying to set its layer properties.self.colorSwatch = [[UIView alloc] initWithFrame:CGRectMake(400, 150, 100, 100)];self.color...
分类:其他好文   时间:2014-10-29 12:39:13    阅读次数:143
A Tour of Go Methods continued
In fact, you can define a method onanytype you define in your package, not just structs.You cannot define a method on a type from another package, or ...
分类:其他好文   时间:2014-10-28 19:46:15    阅读次数:203
启动Memcache,出现memcached: error while loading shared libraries: libevent-1.4.so.1: cannot open shared
1、有可能是装了多个libevent而导致memcache无法识别哪一个,解决方法就是卸载掉一个libevent2、只安装了一个libevent,但是也报这个错,解决方法 32位系统下:ln -s /usr/lib/libevent-1.4.so.1/usr/lib/64位系统下:ln -s ...
分类:系统相关   时间:2014-10-28 17:25:34    阅读次数:201
C++ lambda 表达室传递的变量默认不可变
我遇到如下问题: int count=0; listener->onTouchMoved=[count](Touch* t,Event* e){ count++; log("onTouchMoved"); }; Xcode下的编译错误为:Cannot assign to a variable captured by copy...
分类:编程语言   时间:2014-10-28 13:58:42    阅读次数:166
Navicat的1577 – Cannot proceed because system tables used by Event Scheduler where found damaged at s
方法: 1、将mysql_upgrade.exe和mysqlcheck.exe两个文件复制到 APMServ5.2.6\MySQL5.1\bin目录下。 2、开始->运行->输入cmd回车,在操作提示符下输入 E:\APMServ5.2.6\MySQL5.1\bin\mysql_upgrade -u root -p (数据库用户名和密码) 然后回车,待运行完之后关闭DOS窗口。(将其中的E:\APMserv5.2.6改成你自己实际安装的目录即可) 3、停止APMserv后再重新启动APMserv一次(最好重...
分类:其他好文   时间:2014-10-28 12:15:48    阅读次数:195
Thread 1 cannot allocate new log的问题分析 (转载)
Thread 1 cannot allocate new log的问题分析发生oracle宕机事故,alert文件中报告如下错误:Fri Jan 12 04:07:49 2007Thread 1 cannot allocate new log, sequence 187398Checkpoint n...
分类:其他好文   时间:2014-10-28 11:37:05    阅读次数:278
A Tour of Go Maps
A map maps keys to values.Maps must be created withmake(notnew) before use; thenilmap is empty and cannot be assigned to.package main import "fmt"type...
分类:其他好文   时间:2014-10-28 00:18:07    阅读次数:184
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