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Pass a data.frame column name to a function
...cept a data.frame ( x ) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function.
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How to use git bisect?
...ying that git bisect is awesome. However, I'm not a native speaker and I can't understand why it's awesome.
6 Answers
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How do search engines deal with AngularJS applications?
I see two issues with AngularJS application regarding search engines and SEO:
15 Answers
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What are the underlying data structures used for Redis?
...ange at first: if you are not interested in Redis internals you should not care about how data types are implemented internally. This is for a simple reason: for every Redis operation you'll find the time complexity in the documentation and, if you have the set of operations and the time complexity,...
Fastest hash for non-cryptographic uses?
...at CRC32 will have more collisions than MD5 or even SHA-1 hashes, simply because of the reduced length (32 bits compared to 128 bits respectively 160 bits). But if you just want to check whether a stored string is corrupted, you'll be fine with CRC32.
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SSL certificate is not trusted - on mobile only [closed]
...tml
You should be able to see if there are any issues with your ssl certificate chain.
I am guessing that you have SSL chain issues. A short description of the problem is that there's actually a list of certificates on your server (and not only one) and these need to be in the correct order. If they...
c++ 写日志通用类，可设置日志级别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...evel)
return;
// 设置地域，不然fprintf写不了中文
setlocale(0, "chs");
FILE *fp = NULL;
TCHAR szLogFile[MAX_PATH] = {0};
va_list args;
va_start(args, fmt);
GetCurrentDirectory(MAX_PATH, szLogFile);
SYSTEMTIME sys;
GetLocalTime( &sys );
// 创建Log目录
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选中CListCtrl指定行并发送LVN_ITEMCHANGED消息 - C/C++ - 清泛网 - 专注C/C++及内核技术
...d;
nmlv.hdr.idFrom = m_listReport.GetDlgCtrlID();//GetDlgCtrlId() ;0x00190ca4
nmlv.hdr.code = LVN_ITEMCHANGED;
nmlv.iItem = nIndex ;
nmlv.iSubItem = 0;
nmlv.uNewState = 3 ;
nmlv.uOldState = 0;
nmlv.uChanged = LVIF_STATE;
nmlv.lParam = 0;
m_listReport.GetParent()->SendMessageA(WM_NOTIFY,nmlv...
十张图带你入门Map/Reduce - C/C++ - 清泛网 - 专注C/C++及内核技术
... —— 所属州和城市年度平均温度。比如：San Francisco：{CA，58}。现在你想计算每年的平均温度 —— BY STATE。因为可以通过state对city进行分组查询，然后计算一个州的平均温度而不涉及到其他的州 —— 这里就将会出现高度并行算...
phpcms 启用手机门户（自动判断手机浏览器） - 更多技术 - 清泛网 - 专注C/...
...名管理系统中简析这个域名到你的服务器地址。2、修改 ca...1、确定一个域名作为你手机wap站点的访问域名，例如：http://m.xxx.com 。接下来在域名管理系统中简析这个域名到你的服务器地址。
2、修改\caches\configs\route.php 文件，...