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Is there a standardized method to swap two variables in Python?
In Python, I've seen two variable values swapped using this syntax:
7 Answers
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A generic error occurred in GDI+, JPEG Image to MemoryStream
This seems to be a bit of an infamous error all over the web. So much so that I have been unable to find an answer to my problem as my scenario doesn't fit. An exception gets thrown when I save the image to the stream.
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Should I learn C before learning C++? [closed]
I visited a university CS department open day today and in the labs tour we sat down to play with a couple of final-year projects from undergraduate students. One was particularly good - a sort of FPS asteroids game. I decided to take a peek in the src directory to find it was done in C++ (most of...
How do I add the contents of an iterable to a set?
What is the "one [...] obvious way" to add all items of an iterable to an existing set ?
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Why can't yield return appear inside a try block with a catch?
The following is okay:
4 Answers
4
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How do I create a unique constraint that also allows nulls?
I want to have a unique constraint on a column which I am going to populate with GUIDs. However, my data contains null values for this columns. How do I create the constraint that allows multiple null values?
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Should I instantiate instance variables on declaration or in the constructor?
Is there any advantage for either approach?
15 Answers
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getApplication() vs. getApplicationContext()
I couldn't find a satisfying answer to this, so here we go: what's the deal with Activity/Service.getApplication() and Context.getApplicationContext() ?
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In a django model custom save() method, how should you identify a new object?
I want to trigger a special action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.)
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Semantic Diff Utilities [closed]
I'm trying to find some good examples of semantic diff/merge utilities. The traditional paradigm of comparing source code files works by comparing lines and characters.. but are there any utilities out there (for any language) that actually consider the structure of code when comparing files?
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