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How to convert a Django QuerySet to a list
...r.id for existing_answer in existing_question_answers)
answers = itertools.ifilter(lambda x: x.id not in ids, answers)
Read when QuerySets are evaluated and note that it is not good to load the whole result into memory (e.g. via list()).
Reference: itertools.ifilter
Update with regard to the com...
What are the differences between LinearLayout, RelativeLayout, and AbsoluteLayout?
I am confused about the difference between LinearLayout, RelativeLayout, and AbsoluteLayout.
Could someone please tell me the exact differences between them?
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Get a list of all the files in a directory (recursive)
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weird..this gives the root path even if i preface it with a . It goes /./path
– light24bulbs
Jul 23 '18 at 15:05
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relative path in BAT script
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@mozzbozz If you can guarantee that %~dp0 will always have a trailing backslash both statements will work. Otherwise the one with the additional backslash is the safer variant.
– Ansgar Wiechers
N...
ThreadStatic v.s. ThreadLocal: is generic better than attribute?
...s defined using attribute while ThreadLocal<T> uses generic.
Why different design solutions were chosen?
What are the advantages and disadvantages of using generic over attributes in this case?
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Save and load MemoryStream to/from a file
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Yes that is correct. The difference between them is that CopyTo copies from whatever the current position is instead of always from the begining like WriteTo does.
– AnorZaken
Sep 14 '15 at 19:33
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Hibernate problem - “Use of @OneToMany or @ManyToMany targeting an unmapped class”
...y. The former makes the entity detectable. The latter is just an addition.
if you are manually listing your entities (in persistence.xml, in hibernate.cfg.xml, or when configuring your session factory), then make sure you have also listed the ScopeTopic entity
make sure you don't have multiple Scope...
Does reading an entire file leave the file handle open?
If you read an entire file with content = open('Path/to/file', 'r').read() is the file handle left open until the script exits? Is there a more concise method to read a whole file?
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How to make a vertical line in HTML
...oo but separating them is handy as then you can easily adjust in one place if needed. Also putting it in a separate CSS file is better for performance as it can be cached by the browser and you end up transmitting less bytes over the wire each time you request the rendered HTML.
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ValueError: numpy.dtype has the wrong size, try recompiling
...ackage, that uses numpy in a compiled extension, is compiled against a specific version of numpy. Future version of numpy will be compatible with the compiled extension of the package (for exception see below).
Distributers of those other packages do not need to recompile their package against a new...