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Legality of COW std::string implementation in C++11
...< *p << '\n'; // p is dangling
The point of that example is to demonstrate why GCC's reference counted (COW) string is not valid in C++11. The C++11 standard requires this code to work correctly. Nothing in the code permits the p to be invalidated in C++11.
Using GCC's old reference-cou...
How can I return pivot table output in MySQL?
... T-SQL without any pivots:" Not only SQL Server it should work on most database vendors which follows the ANSI SQL standards. Note that SUM() can only work with numeric data if you ned to pivot strings you will have to use MAX()
– Raymond Nijland
Mar 25 '19 at...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
注意linux生产环境不能安装32位的mongodb，因为32位受限于操作系统最大2G的文件限制。
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每...
jQuery Date Picker - disable past dates
... in the past, this is a possible solution. This is what we ended up doing (based on @Nicola Peluchetti's answer)
var dateToday = new Date();
$("#myDatePickerInput").change(function () {
var updatedDate = $(this).val();
var instance = $(this).data("datepicker");
var date = $.datepicker....
Why is SQL Server 2008 Management Studio Intellisense not working?
...n/details.aspx?id=26727
32 Bit:
SQLServer2008R2SP1-KB2528583-x86-ENU.exe
64 Bit:
SQLServer2008R2SP1-KB2528583-x64-ENU.exe
I have applied this SP1 and now my intellisense works again. I hope this helps! (:
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Convert between UIImage and Base64 string
Does anyone know how to convert a UIImage to a Base64 string, and then reverse it?
24 Answers
...
Expand/collapse section in UITableView in iOS
...sing the UITableView or the headers that are already there will be a pain. Based on the way they work now, I am not sure you can easily get actions out of them. You could set up a cell to LOOK like a header, and setup the tableView:didSelectRowAtIndexPath to manually expand or collapse the section i...
Regular expression to match balanced parentheses
...)]+|\)(?<-c>))*(?(c)(?!))\)
Where c is used as the depth counter.
Demo at Regexstorm.com
Stack Overflow: Using RegEx to balance match parenthesis
Wes' Puzzling Blog: Matching Balanced Constructs with .NET Regular Expressions
Greg Reinacker's Weblog: Nested Constructs in Regular Expression...
Get Unix Epoch Time in Swift
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What's the difference between a file descriptor and file pointer?
... unsigned char *_ptr;
int _cnt;
unsigned char *_base;
unsigned char *_bufendp;
short _flag;
short _file;
int __stdioid;
char *__newbase;
#ifdef _THREAD_SAFE
void *_lock;
#else
long _unused[1];
#endif
#...