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What are some uses of template template parameters?
...drei Alexandrescu:
He uses a classes with template template parameters in order to implement the policy pattern:
// Library code
template <template <class> class CreationPolicy>
class WidgetManager : public CreationPolicy<Widget>
{
...
};
He explains:
Typically, the host cla...
Sleep until a specific time/date
...X and don't work under MacOS! If under Mac, goto my pure bash function)
In order to reduce forks, instead of running date two times, I prefer to use this:
Simple starting sample
sleep $(($(date -f - +%s- <<< $'tomorrow 21:30\nnow')0))
where tomorrow 21:30 could be replaced by any kind of d...
Find running median from a stream of integers
...nting in a quantile chip that can be used in industrial controllers and recorders. The algorithm is further extended to histogram plotting. The accuracy of the algorithm is analyzed.
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improv...
JavaScript post request like a form submit
...ld);
});
// The form needs to be a part of the document in
// order for us to be able to submit it.
$(document.body).append(form);
form.submit();
}
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improve this answer
...
多媒体组件 · App Inventor 2 中文网
...全就是杂乱的，不知是不是因为版本过旧，还是其他设置问题，经过一系列尝试（包括设置文本朗读器的国家及语言属性）仍然是不行的。最终只得选择“Google文字转语言引擎”（语音设置为”中文“），中文朗读的效果也非常...
How to detect iPhone 5 (widescreen devices)?
...rientation.
So obviously, the previous code won't work out of the box.
In order to fix this, you can simply use the new nativeBounds property, instead of bounds, as it won't change with the orientation, and as it's based on a portrait-up mode.
Note that dimensions of nativeBounds is measured in pix...
What is a NullReferenceException, and how do I fix it?
...omePropertyName</p> <!-- Also throws -->
WPF Control Creation Order and Events
WPF controls are created during the call to InitializeComponent in the order they appear in the visual tree. A NullReferenceException will be raised in the case of early-created controls with event handlers,...
WPF - How to force a Command to re-evaluate 'CanExecute' via its CommandBindings
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I edited your answer in order to re-apply my vote. I didn't change anything in the edit. Thanks again.
– Drew Noakes
Aug 27 '09 at 11:18
...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...
The order that function parameters are evaluated is unspecified behavior. (This won't make your program crash, explode, or order pizza... unlike undefined behavior.)
The only requirement is that all parameters must be fully eval...
Return HTTP status code 201 in flask
...
In my case I had to combine the above in order to make it work
return Response(json.dumps({'Error': 'Error in payload'}),
status=422,
mimetype="application/json")
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