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Reload django object from database
... throws a DoesNotExist exception if the underlying object was deleted when calling refresh_from_db. FYI.
– Tim Tisdall
Jan 17 at 19:26
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php static function
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In the first class, sayHi() is actually an instance method which you are calling as a static method and you get away with it because sayHi() never refers to $this.
Static functions are associated with the class, not an instance of the class. As such, $this is not available from a static context (...
A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception pro
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If you create a Task, and you don't ever call task.Wait() or try to retrieve the result of a Task<T>, when the task is collected by the garbage collector, it will tear down your application during finalization. For details, see MSDN's page on Exception Handli...
Plotting two variables as lines using ggplot2 on the same graph
...e more specific if one wants to choose specific colors rather than automatically selected colours by the function.
– I_m_LeMarque
Apr 5 '19 at 9:42
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How to read and write into file using JavaScript?
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Also, depending on your situation you could make an ajax call to a php script and dump the data that way. This was useful in my situation where I wanted to store some data generated on the javascript side, but didn't matter how it got there.
– Dustin Graham
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java: (String[])List.toArray() gives ClassCastException
...You can cast Object to Double assuming that's it is truly a Double. So logically, you could do the same with an array, but it's simply not part of the language. If you cast Object to Double there will be a runtime check to make sure Object actually IS a Double. If you cast Double to Object there is ...
How can I save an image to the camera roll?
...sAlbum() function.
//Let's say the image you want to save is in a UIImage called "imageToBeSaved"
UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);
Edit:
//ViewController.m
- (IBAction)onClickSavePhoto:(id)sender{
UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);
}...
How do I terminate a thread in C++11?
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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 tha...
Load dimension value from res/values/dimension.xml from source code
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You can add an extension to simplify this process. It enables you to just call context.dp(R.dimen. tutorial_cross_marginTop) to get the Float value
fun Context.px(@DimenRes dimen: Int): Int = resources.getDimension(dimen).toInt()
fun Context.dp(@DimenRes dimen: Int): Float = px(dimen) / resources...
When to use nested classes and classes nested in modules?
...ner classes and namespaced Ruby classes. A non-static Java nested class is called an inner class and it exists only within an instance of the outer class. There is a hidden field that allows outward references. The Ruby inner class is simply namespaced and is not "bound" to the enclosing class in an...