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NSNull的用法和原理
Represent nil with NSNullIt’s not possible to add nil to the collection classes described in this section because nil in Objective-C means “no object....
分类:其他好文   时间:2015-05-06 14:46:39    阅读次数:111
Ubuntu 更新源失败[GPG error]
对于错误 GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: NO_PU...
分类:系统相关   时间:2015-05-06 10:43:05    阅读次数:261
Xcode 工程文件打开不出来, cannot be opened because the project
Xcode 工程文件打开不出来, cannot be opened because the project file cannot be parsed.svn更新代码后,打开xcode工程文件,会出现 xxx..xcodeproj cannot be opened because the proje...
分类:其他好文   时间:2015-05-03 13:11:34    阅读次数:141
ACM学习历程——HDU3333 Turing Tree(线段树 && 离线操作)
Problem DescriptionAfter inventing Turing Tree, 3xian always felt boring when solving problems about intervals, because Turing Tree could easily have ...
分类:其他好文   时间:2015-05-02 12:20:50    阅读次数:90
The file couldn’t be opened because you don’t have permission to view it
because you dont have permission to view it解决办法Project---Build Setting中 修改这一项,变成Default Compiler(Apple LLVM 6.0)图片展示:
分类:其他好文   时间:2015-05-01 10:40:18    阅读次数:154
JD IPO address by liuqiangdong
Ladies and gentlemen, Good evening.I'd rather use english, not mandarin.Because during the road show, I felt so sorry.When I opened my mouth I have to...
分类:其他好文   时间:2015-05-01 10:33:26    阅读次数:168
This application failed to start because it could not find or load the Qt platform plugin "xcb".
1. copy libQt5DBus.so.52. add QT_PLUGIN_PATHblog.csdn.net/windows_nt/article/details/24205671his application failed to start because it could not fin....
分类:移动开发   时间:2015-04-30 18:05:25    阅读次数:325
get app id
InstallDownload the Web AppBuilder for ArcGIS (Developer Edition) ZIP file to your local drive and unzip it. Because Web AppBuilder runs on top of Nod...
分类:移动开发   时间:2015-04-28 22:17:50    阅读次数:274
由于线程停在某个无法进行垃圾回收的点(可能是因为已对代码进行了优化),因此无法计算表达式的值
前段时间在调试代码的过程中,调试器无法跟踪到变量的值并报异常,AnisometryT Cannot evaluate expression because a thread is stopped at a point where garbage collection is impossible, p...
分类:编程语言   时间:2015-04-28 22:14:04    阅读次数:1093
《TCP/IP详解,卷1:协议》学习记录
在“第20章—TCP的成块数据流—20.6慢启动—一个例子”中,中文版有如下翻译“此时尽管可发送多达3个报文段,可是在下一个ACK收到之前,只发送了2个报文段”,英文版原文为“Two more segments are sent (not three) because the ACK for seg...
分类:其他好文   时间:2015-04-28 11:19:36    阅读次数:141
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