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Does delete on a pointer to a subclass call the base class destructor?
...new C;
}
Allocating an instance of B and then deleting is clean, because what B allocates internally will also be deleted in the destructor.
But instances of class C will leak memory, because it allocates an instance of A which it does not release (in this case C does not even have a destructor)....
In a django model custom save() method, how should you identify a new object?
...her types of primary key field.
If you really want to know you have to do what the O/RM does and look in the database.
Of course you have a specific case in your code and for that it is quite likely that self.pk == None tells you all you need to know, but it is not a general solution.
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Select datatype of the field in postgres
...pg_typeof( date_part( 'year', now() ) ) AS expr probably is different from what you'd expect.
– Leo Orientis
Feb 27 '19 at 18:26
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can we use xpath with BeautifulSoup?
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So what is the alternative?
– static_rtti
May 8 '17 at 11:04
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Creating a favicon [closed]
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I personally don't know what the best practice is here. On my site I think we just use one. These could be helpful for chrome progressive web apps when combined with a manifest.json.
– Jared Menard
Feb 12 '18 a...
versionCode vs versionName in Android Manifest
...hat versionName is just something that's shown to the user, versionCode is what matters. Just keep increasing it and everything should be good.
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UIPanGestureRecognizer - Only vertical or horizontal
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I should add this this was helpful for me as well, but what I had to add to get the pan gesture recognizer to trigger was in the else part of the if, under the line _drag = YES I added self.state = UIGestureRecognizerStateChanged;
– bolnad
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How to save an image locally using Python whose URL address I already know?
...ng from may be using cookies, the User-Agent or other headers to determine what content to serve you. These will be different between your browser and Python.
– Liquid_Fire
Oct 29 '14 at 16:07
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Working copy XXX locked and cleanup failed in SVN
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Did not work by deleting the item out of WC_LOCK - what did work was looking at the blob contents of my WORK_QUEUE item and sure enough it was the issue file - I removed the file from the repo browser and then deleted the work_queue item - after this ran a cleanup and back in...
Is there a limit to the length of HTML attributes?
...w.highdots.com/forums/html/length-html-attribute-175546.html
Although for what you are doing, you should be fine.
As for the upper limits, I have seen jQuery use data attributes hold a few k of data personaly as well.
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