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Windows下如何判断Win32 or x64? - C/C++ - 清泛网 - 专注C/C++及内核技术

Windows下如何判断Win32 or x64?MSDN 里说,VC 有 3 个预处理常量,分别是 _WIN32,_WIN64,WIN32。这三个常量如何使用呢?看起来简单,其实是很困惑的。  在 Win3...MSDN 里说,VC 有 3 个预处理常量,分别是 _WIN32,_WIN64,WIN32。这三个...
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如何把一个POINT转化为lParam参数 - C/C++ - 清泛网 - 专注C/C++及内核技术

如何把一个POINT转化为lParam参数MAKELPARAM(pt.x, pt.y);反之:CPoint point(lParam);里面的实现是:CPoint(_In_ LPARAM dwPoint) throw();...ATLTYPES_INLINE CPoin...MAKELPARAM(pt.x, pt.y); 反之: CPoint point(lParam); 里面的实现是: CPoint(_In_ LPARAM dwPoint) thro...
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linux ls、ll命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

linux ls、ll命令详解ls只是简单的列出目录下文件名,ll更加详细的列出了文件的类型、文件所有者权限、文件所有者组权限、文件大小、文件最后修改时间。ls只是简单的列出目录下文件名,ll更加详细的列出了文件的类型、文件...
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js中int和string互换(js int转string,js string转int) - 更多技术 - 清...

...以参照如下方法: 一、Javascript 将 int 转 string (1) var x = 100; a = x.toString(); (2) var x = 100; a = x + ""; //JS会自动隐性转换 二、Javascript 将string 变成 int var s = "32" var i = new Number(s); 或 var i = parseInt(s); parseInt返回值: ...
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PHP获取图片颜色值的方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...jpeg("test.jpg");//测试图片,自己定义一个,注意路径 for ($x=0;$x<imagesx($i);$x++) { for ($y=0;$y<imagesy($i);$y++) { $rgb = imagecolorat($i,$x,$y); $r=($rgb >>16) & 0xFF; $g=($rgb >> & 0xFF; $b=$rgb & 0xFF; $rTotal += $r; $gTotal += $g; $bTotal...
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js/php判断终端类型:PC访问、手机访问、微信访问 - 更多技术 - 清泛网 - ...

...码如下:<script>function GetQueryString(name) { var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)"); v 一般也可以在前端用js来判断访问终端,代码如下: <script> function GetQueryString(name) { var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)"); va...
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How do I change the background color of a plot made with ggplot2

...d')) See here for more theme details Quick reference sheet for legends, axes and themes. share | improve this answer | follow | ...
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Const in JavaScript: when to use it and is it necessary?

...keyword. A variable is a data structure that contains information that is expected to change. A constant is a data structure that contains information that will never change. If there is room for error, var should always be used. However, not all information that never changes in the lifetime of a p...
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print call stack in C or C++

... For a linux-only solution you can use backtrace(3) that simply returns an array of void * (in fact each of these point to the return address from the corresponding stack frame). To translate these to something of use, there's backtrace...
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OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...很顺利 具体情况这里http://pkgs.org/centos-6/ghettoforge-testing-x86_64/openssh-6.6.1p1-4.gf.el6.x86_64.rpm.html 备份原有源 cd /etc/yum.repos.d/ mv rhel-source.repo rhel-source.repo.bak mv packagekit-media.repo packagekit-media.repo.bak 配置源 vi CentOS-Base.repo [base] n...