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How to declare std::unique_ptr and what is the use of it?
...:unique_ptr works and for that I found this document. The author starts from the following example:
4 Answers
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Performance optimization strategies of last resort [closed]
...tried to explain this in a Dr. Dobbs article in November 1993, by starting from a conventionally well-designed non-trivial program with no obvious waste and taking it through a series of optimizations until its wall-clock time was reduced from 48 seconds to 1.1 seconds, and the source code size was ...
How to express a One-To-Many relationship in Django
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+1 for doing it from the PhoneNumber. Now it's starting to make sense. ForeignKey is essentially many-to-one, so you need to do it backwards to get a one-to-many :)
– Naftuli Kay
Aug 3 '11 at 16:35
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How do I convert a pandas Series or index to a Numpy array? [duplicate]
...s >= 0.24
Deprecate your usage of .values in favour of these methods!
From v0.24.0 onwards, we will have two brand spanking new, preferred methods for obtaining NumPy arrays from Index, Series, and DataFrame objects: they are to_numpy(), and .array. Regarding usage, the docs mention:
We hav...
How can I add the sqlite3 module to Python?
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if your python3 is built from source manually , and meet this error, you should install sqlite-devel package first, then rebuild python3.
– ngn999
Mar 28 '16 at 1:28
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Should one use < or
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I remember from my days when we did 8086 Assembly at college it was more performant to do:
for (int i = 6; i > -1; i--)
as there was a JNS operation that means Jump if No Sign. Using this meant that there was no memory lookup afte...
Understanding FFT output
...ioned by you in point 1) is, in general? In my case, on a signal of values from an accelerometer (is m/s^2). I can't quite figure it out.
– Markus Wüstenberg
Jan 27 '14 at 17:19
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Are static methods inherited in Java?
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All methods that are accessible are inherited by subclasses.
From the Sun Java Tutorials:
A subclass inherits all of the public and protected members of its parent, no matter what package the subclass is in. If the subclass is in the same package as its parent, it also inherits the...
Writing to an Excel spreadsheet
I am new to Python. I need to write some data from my program to a spreadsheet. I've searched online and there seem to be many packages available (xlwt, XlsXcessive, openpyxl). Others suggest to write to a .csv file (never used CSV and don't really understand what it is).
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Read file data without saving it in Flask
... quick example: file = request.files.get('file') filetype = magic.from_buffer(file.read(1024))
– endolith
Dec 26 '14 at 20:00
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