大约有 10,000 项符合查询结果(耗时:0.0179秒) [XML]

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What is that “total” in the very first line after ls -l? [closed]

...used, and the relatively deep levels of abstraction revolving around disk access. Examples of conflicting information: du (or ls -s) vs stat Running du * in a project folder yields the following: (Note: ls -s returns the same results.) dactyl:~/p% du * 2 check.cc 2 check.h 1 DO...
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微软VS苹果 桌面操作系统的终极一战 - 创意 - 清泛网 - 专注C/C++及内核技术

...盗版系统最多的国家(就是咱们)的科技厂商合作,通过电脑助手类软件,第一时间向各大用户推送正版系统,目的就是装机率,装机率,装机率。 对于免费授权操作系统,微软自然有着自己的苦衷:移动设备的大潮,将桌面...
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What's the difference between a continuation and a callback?

...on called call-with-current-continuation which is often abbreviated as callcc. Unfortunately callcc can't be fully implemented in JavaScript, but we could write a replacement function for most of its use cases: pythagoras(3, 4, console.log); function pythagoras(x, y, cont) { var x_squar...
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:: (double colon) operator in Java 8

... akhil_mittalakhil_mittal 17.4k77 gold badges7474 silver badges7676 bronze badges add a comm...
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How to parse JSON in Scala using standard Scala classes?

...his is a solution based on extractors which will do the class cast: class CC[T] { def unapply(a:Any):Option[T] = Some(a.asInstanceOf[T]) } object M extends CC[Map[String, Any]] object L extends CC[List[Any]] object S extends CC[String] object D extends CC[Double] object B extends CC[Boolean] val ...
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How to get the number of characters in a std::string?

...r string types in non-standard C++ libraries, such as MFC's CString, ATL's CComBSTR, ACE's ACE_CString, and so on, with methods such as .GetLength(), and so on. I can't remember the specifics of them all right off the top of my head. The STLSoft libraries have abstracted this all out with what they...
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Omit rows containing specific column of NA

... M-- 17.8k77 gold badges4242 silver badges7474 bronze badges answered Feb 28 '19 at 11:48 DroneyDroney ...
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How to retrieve a single file from a specific revision in Git?

...hs ago. I found the revision at that date; it's 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8 . I need to see what one file looks like, and also save it as a ("new") file. ...
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传感器组件 · App Inventor 2 中文网

...传感器值。然而,这些值无法补偿默认为横向模式的平板电脑,需要 MIT App Inventor 程序员进行补偿。但是,在手机等纵向模式设备中进行补偿会导致结果不正确。 我们现在检测横向模式平板电脑并执行补偿。但是,如果你的...
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CSS background image to fit width, height should auto-scale in proportion

...he bottom of the image. Most of the water is cut, as well as a part of the sky. You don't see the complete image anymore, but neither do you see any background color; the image <em>covers</em> all of the <code><div></code>.</p> </div> ...