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How to include “zero” / “0” results in COUNT aggregate?

... You want an outer join for this (and you need to use person as the "driving" table) SELECT person.person_id, COUNT(appointment.person_id) AS "number_of_appointments" FROM person LEFT JOIN appointment ON person.person_id = appointment.person_id GROUP BY p...
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What is `related_name` used for in Django?

What is the related_name argument useful for on ManyToManyField and ForeignKey fields? For example, given the following code, what is the effect of related_name='maps' ? ...
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Inserting a text where cursor is using Javascript/jquery

... This worked great, but it doesn't handle replacing selected text as all text editors do. This may not be needed for the poster's original question, but if you need it, you can simply replace 'strPos' with 'txtArea.selectionEnd'. My answer below shows this, a...
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mingw-w64 threads: posix vs win32

I'm installing mingw-w64 on Windows and there are two options: win32 threads and posix threads. I know what is the difference between win32 threads and pthreads but I don't understand what is the difference between these two options. I doubt that if I will choose posix threads it will prevent me fro...
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Disabled UIButton not faded or grey

...utton which I have created in Interface Builder. I can successfully enable and disable it like this in my code ... 19 Answe...
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How to stop mongo DB in one command

... Starting and Stopping MongoDB is covered in the MongoDB manual. It explains the various options of stopping MongoDB through the shell, cli, drivers etc. It also details the risks of incorrectly stopping MongoDB (such as data corruptio...
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Total memory used by Python process?

... psutil is cross platform and can return the same values as the ps command line tool: pythonhosted.org/psutil/#psutil.Process.memory_info – amos Jul 3 '14 at 21:38 ...
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Algorithm to compare two images

...ctive areas of the image that could represent zoomed portions of the image and various positions and rotations. It starts getting tricky if one of the images are a skewed version of another, these are the sort of limitations you should identify and compromise on. Matlab is an excellent tool for te...
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Configure Sublime Text on OS X to show full directory path in title bar

... edited Feb 29 at 14:28 sandre89 2,6942323 silver badges4747 bronze badges answered Sep 20 '14 at 12:29 ...
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Multiple lines of text in UILabel

...Mode.WordWrap; textLabel.Lines = 0; Restored old answer (for reference and devs willing to support iOS below 6.0): textLabel.lineBreakMode = UILineBreakModeWordWrap; textLabel.numberOfLines = 0; On the side: both enum values yield to 0 anyway. ...