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What's the difference between integer class and numeric class in R
...ou know that they will never be converted to doubles (used as ID values or indexing) since integers require less storage space. But if they are going to be used in any math that will convert them to double, then it will probably be quickest to just store them as doubles to begin with.
...
SQL - using alias in Group By
...ceptions though: MySQL and Postgres seem to have additional smartness that allows it.
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Listen for key press in .NET console app
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Use Console.KeyAvailable so that you only call ReadKey when you know it won't block:
Console.WriteLine("Press ESC to stop");
do {
while (! Console.KeyAvailable) {
// Do something
}
} while (Console.ReadKey(true).Key != ConsoleKey.Escape);
...
What is the point of function pointers?
...nction pointers. I guess it may be useful in some cases (they exist, after all), but I can't think of a case where it's better or unavoidable to use a function pointer.
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App Inventor 2 计步传感器与距离测量教程 · App Inventor 2 中文网
...理
现代Android手机内置硬件计步器传感器（TYPE_STEP_COUNTER），精度高且功耗低。
使用扩展
需要计步器扩展（如StepCounter扩展）。
when Screen1.Initialize() {
var 今日步数 = 微数据库1.GetValue("today_steps", 0)
...
Android Notification Sound
...n Codeding
String en_alert, th_alert, en_title, th_title, id;
int noti_all, noti_1, noti_2, noti_3, noti_4 = 0, Langage;
class method
Intent intent = new Intent(context, ReserveStatusActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
Notificati...
Amazon S3 - HTTPS/SSL - Is it possible? [closed]
..., but it bypassing static website hosting rules, such as redirect rules to index.html
– Kim T
Dec 14 '17 at 3:51
This ...
Can Python print a function definition?
...pile a regular expression pattern, returning a pattern object."
return _compile(pattern, flags)
This will work in the interactive prompt, but apparently only on objects that are imported (not objects defined within the interactive prompt). And of course it will only work if Python can find th...
Chrome developer tools: View Console and Sources views in separate views/vertically tiled?
... correctly */
top: 26px !important;
height: auto !important;
z-index: 1;
border-left: 1px solid rgb(64%, 64%, 64%);
}
#-webkit-web-inspector.show-toolbar-icons #drawer[style*="height"]:not([style*="height: 0"]) {
top: 56px !important;
}
The result looks like this:
...
How do I terminate a thread in C++11?
...
You could call std::terminate() from any thread and the thread you're referring to will forcefully end.
You could arrange for ~thread() to be executed on the object of the target thread, without a intervening join() nor detach() on that...