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使用 JSON 和 Web API · App Inventor 2 中文网

...式提供给它后续步骤。在下面例子中,我们给它 walk all at level 和 title 关键路径来获取列表中每个帖子标题(按appearance排序)。这段代码在功能上等同于上面使用 for each 块代码,但它更简洁。 发送数据 将数据发...
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泰迪熊为什么叫泰迪 - 杂谈 - 清泛网 - 专注C/C++及内核技术

...负鼠配地瓜)。于是塔夫托说,“for possum first, last, and all the time”,这句话没看懂。但是塔夫托因为这句话被政治漫画家绘作一只负鼠,名为 Billy Possum(比利鼠)。 由于罗斯福和泰迪熊巨大成功,玩具商们看准了这次商机...
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Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术

...<VERSION>.tar.gz shell> cd LuaJIT-<VERSION> shell> make shell> make install 因为安装在缺省路径,所以LuaJIT对应lib,include均在/usr/local目录里。 shell> export LUAJIT_LIB=/usr/local/lib shell> export LUAJIT_INC=/usr/local/include/luajit-<VERSION> 下面就可以编译...
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Writing string to a file on a new line every time

...se file.write(str(a)+'\n') – 未来陆家嘴顶尖投资人 May 4 '17 at 6:43 ...
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[since C++11] std::array使用 - C/C++ - 清泛网 - 专注C/C++及内核技术

...y<char> as a fix sized c-string. array<char, 100> str = {0}; // all elements initialized with 0. char *p = str.data(); strcpy(p, "hello world"); printf("%s\n", p); // hello world END_TEST; 上面这个例子让我想起了std::string, 它有一个c_str()方法,...
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VC窗口刷新InvalidateRect和UpdateWindow - C/C++ - 清泛网 - 专注C/C++及内核技术

...INT messages. If an application processes a WM_PAINT message but does not call BeginPaint or otherwise clear the update region, the application continues to receive WM_PAINT messages as long as the region is not empty. In all cases, an application must clear the update region before returning from t...
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内存调试技巧:C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术

...他许多通用语言(如 Java&trade;、Ruby、Haskell、C#、Perl、Smalltalk 等),每种语言都有众多爱好者和各自优点。但是,从计算角度来看,每种编程语言优于 C 或 C++ 主要优点都与便于内存管理密切相关。与内存相关编程是如...
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闲扯Nginxaccept_mutex配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...际上Nginx作者Igor Sysoev曾经给过相关解释: OS may wake all processes waiting on accept() and select(), this is called thundering herd problem. This is a problem if you have a lot of workers as in Apache (hundreds and more), but this insensible if you have just several workers as ...
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自动生成Linux下Makefile全攻略(automake原理) - C/C++ - 清泛网 - 专注C/C++及内核技术

...configure 输出Makefile文件 2、make 输出二进制 3、make install 安装二进制到指定目录 make及make install规则都需要参照Makefile文件,而Makefile是自动生成,大家有兴趣可以查看下Makefile,代码很长很复杂。当然我们可以直接在Mak...
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vc/mfc *通配符 批量删除文件 - c++1y / stl - 清泛IT社区,为创新赋能!

...0'也一样,笔者亲测,删除有时成功有时失败。 改用C++FindNextFile,支持 * 通配符查找文件,核心代码如下: WIN32_FIND_DATA FindFileData; char szCurPath[MAX_PATH + 1] = { 0 }; GetCurrentDirectory(MAX_PATH, szCurPath); CString findFileName; findFileName.Format(...