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Find most frequent value in SQL column
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SELECT `column`,
COUNT(`column`) AS `value_occurrence`
FROM `my_table`
GROUP BY `column`
ORDER BY `value_occurrence` DESC
LIMIT 1;
Replace column and my_table. Increase 1 if you want to see the N most common values of the column.
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How do I get an ISO 8601 date on iOS?
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Use NSDateFormatter:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSLocale *enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
[dateFormatter setLocale:enUSPOSIXLocale];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
[dateFormatter setCale...
C/C++中退出线程的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...么决不应该调用ExitThread。应该使用Visual C++运行期库函数_endthreadex。如果不使用Microsoft的Visual C++编译器，你的编译器供应商有它自己的ExitThread的替代函数。不管这个替代函数是什么，都必须使用。
3、TerminateThread函数
调用Te...
Python 3 turn range to a list
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You can just construct a list from the range object:
my_list = list(range(1, 1001))
This is how you do it with generators in python2.x as well. Typically speaking, you probably don't need a list though since you can come by the value of my_list[i] more efficiently (i + 1), and...
SetRegistryKey 作用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，
// 例如修改为公司或组织名
SetRegistryKey(_T("应用程序向导生成的本地应用程序"));
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}
那么SetRegistryKey有什么作用呢？
先看下图：
可以看到，注册表HKEY_CURRENT_USER下面会生成 SetRegistryKey 设置...
GetNextDlgTabItem用法详解，回车替代Tab键切换控件焦点 - C/C++ - 清泛网 ...
...第二个参数，TRUE往前，默认FALSE往后）检索对话框中有WS_TABSTOP类型的第一个控件的句柄，即按照对话框...GetNextDlgTabItem 函数按指定方向（第二个参数，TRUE往前，默认FALSE往后）检索对话框中有WS_TABSTOP类型的第一个控件的句柄，...
程序崩溃时malloc/new可能导致死锁，程序卡死退不出 - C/C++ - 清泛网 - 专...
...malloc的可重入性的问题。
2、Linux下可以通过添加一个宏 _REENTRANT 解决（编译时使用libc中安全可重入的malloc函数），Windows未知。
另外，Windows Server2016服务器C++崩溃时容易不彻底，导致卡住死锁，Server2008死锁概率低一些，死锁...
node and Error: EMFILE, too many open files
...t indicates which resource is open. You'll probably see a number of lines all with the same resource name. Hopefully, that now tells you where to look in your code for the leak.
If you don't know multiple node processes, first lookup which process has pid 12211. That'll tell you the process.
In ...
Embedded MongoDB when running integration tests
...ed mongo for each test fails most of the tests. Its better to start before all the tests and shutdown once all have executed
– DBS
Apr 30 '19 at 5:36
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What's the difference between EscapeUriString and EscapeDataString?
...)*+,;=
For completeness, the unreserved characters are alphanumeric and -._~
Both methods escape characters that are neither reserved nor unreserved.
I disagree with the general notion that EscapeUriString is evil. I think a method that escapes only illegal characters (such as spaces) and not res...