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Why is processing a sorted array faster than processing an unsorted array?

...as 2 cycle latency: gcc optimization flag -O3 makes code slower than -O2) VC++ 2010 is unable to generate conditional moves for this branch even under /Ox. Intel C++ Compiler (ICC) 11 does something miraculous. It interchanges the two loops, thereby hoisting the unpredictable branch to the outer l...
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How to get root view controller?

... optional so watch out about that: /// EZSwiftExtensions - Gives you the VC on top so you can easily push your popups var topMostVC: UIViewController? { var presentedVC = UIApplication.sharedApplication().keyWindow?.rootViewController while let pVC = presentedVC?.presentedViewController { ...
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C++判断文件、目录是否存在的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++判断文件、目录是否存在的几种方法在我们平时的编程时,经常需要判断文件或者目录是否存在,相对来说判断文件的存在性比较简单,目录则比较复杂。下面就详细的介绍几种方法。...在我们平时的编程时,经常需要判断...
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mfc从CImageList获取CBitmap位图对象 - C/C++ - 清泛网 - 专注C/C++及内核技术

mfc从CImageList获取CBitmap位图对象通过图像的索引号从CImageList获取CBitmap位图对象的函数如下: CImageList获取CBitmap位图对象void GetListImage(CImageList &Imag...通过位图的索引号从CImageList获取CBitmap位图对象的函数如下: //CImageL...
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C++ ADO ExcelRecordSet.Open打开记录的两个参数adOpenKeyset、adLockBat...

C++ ADO ExcelRecordSet.Open打开记录的两个参数adOpenKeyset、adLockBatchOptimistic的详细说明C++ ADO ExcelRecordSet.Open打开记录的两个参数adOpenKeyset、adLockBatchOptimistic的详细说明:缺省值1 adLockReadOnly RecordSet...C++ ADO ExcelRecordSet.Open打开记录...
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C++静态变量初始化顺序 - C/C++ - 清泛网 - 专注C/C++及内核技术

C++静态变量初始化顺序C++全局静态变量初始化顺序随机,是线程安全的;局部静态变量在函数调用时才初始化,非线程安全。1、C++全局静态变量初始化顺序随机,是线程安全的,由C++标准提出,编译器实 C++全局静态...
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为什么看了那么多创业文章 仍然过不好这一生? - 资讯 - 清泛网 - 专注C/C+...

...超越的可能,马化腾也患上了互联网焦虑症,他不敢离开国去硅谷考察,担心其间的几个月公司就可能没有了,扎克伯格非常想让Facebook进国,因为他发现美国的年轻人现在已经几乎不再用它,这距离他将Myspace挤下神坛的200...
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app inventor屏幕属性的文件范围分别是什么意思? - App Inventor 2 文...

...荐] :Android 2.2及更高版本上文件将从应用程序特定存储读取和写入,在 Android 早期版本上,文件将写入兼容存储。 App的根目录为:/storage/emulated/0/Android/data。读写文件在指定的 files 目录下,如图:(这是AI伴侣的App目录,...
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How to add a separator to a WinForms ContextMenu?

...n Win32, but couldn't remember the syntax. I ended up pulling up some old VC++ 6 files to find it. By the way, I still occasionally refer to "The Petzold Book" for some things. Wow, I'm feeling old... – Brad Bruce Aug 29 '09 at 1:27 ...
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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

从源代码剖析Mahout推荐引擎前言Mahout框架cf.taste包实现了推荐算法引擎,它提供了一套完整的推荐算法工具集,同时规范了数据结构,并标准化了程序开发过程。应用推...前言 Mahout框架cf.taste包实现了推荐算法引擎,它提供...