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How to add “on delete cascade” constraints?
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edited Mar 14 '18 at 8:30
Alexander Farber
17.5k6464 gold badges203203 silver badges359359 bronze badges
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When should I use jQuery deferred's “then” method and when should I use the “pipe” method?
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103
Since jQuery 1.8 .then behaves the same as .pipe:
Deprecation Notice: As of jQuery 1.8, the de...
How to convert std::string to LPCWSTR in C++ (Unicode)
... int slength = (int)s.length() + 1;
len = MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, 0, 0);
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, buf, len);
std::wstring r(buf);
delete[] buf;
return r;
}
std::wstring stemp = s2ws(myStr...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
... 消息流
应用场景
网络开销
QoS 0
最多一次
PUBLISH → Broker → Subscriber
传感器数据、温度读数
最低
QoS 1
至少一次
PUBLISH → PUBACK → PUBLISH → PUBACK
控制指令、报...
Initializing a member array in constructor initializer
... assignments in the body. This is what boost::array does.
Does the C++03 standard say anything special about initializing aggregates (including arrays) in ctor initializers? Or the invalidness of the above code is a corollary of some other rules?
A mem-initializer uses direct initialization....
Where is the documentation for the values() method of Enum?
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180
You can't see this method in javadoc because it's added by the compiler.
Documented in three pl...
How to validate GUID is a GUID
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edited Dec 3 '14 at 15:03
Joseph Woodward
8,70955 gold badges3838 silver badges6161 bronze badges
ans...
Center a 'div' in the middle of the screen, even when the page is scrolled up or down?
...ited Mar 28 '17 at 11:54
user5890979
answered Jun 13 '11 at 18:22
BraedenPBraedenP
6,7...
Updating address bar with new URL without hash or reloading the page
...most "modern" browsers!
Here is the original article I read (posted July 10, 2010): HTML5: Changing the browser-URL without refreshing page.
For a more in-depth look into pushState/replaceState/popstate (aka the HTML5 History API) see the MDN docs.
TL;DR, you can do this:
window.history.pushStat...
How to pass macro definition from “make” command line arguments (-D) to C source code?
...
100
Call make command this way:
make CFLAGS=-Dvar=42
And be sure to use $(CFLAGS) in your compil...