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How to do parallel programming in Python?
For C++, we can use OpenMP to do parallel programming; however, OpenMP will not work for Python. What should I do if I want to parallel some parts of my python program?
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Downloading a picture via urllib and python
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Note for Python 3 it's actually import urllib.request urllib.request.urlretrieve("http://...jpg", "1.jpg"). It's urlretrieve now as of 3.x.
– user1032613
Mar 16 '18 at 0:18
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C99 stdint.h header and MS Visual Studio
... Without this header I have no definitions for useful types such as uint32_t, etc.
7 Answers
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Escape quotes in JavaScript
I'm outputting values from a database (it isn't really open to public entry, but it is open to entry by a user at the company -- meaning, I'm not worried about XSS ).
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Plotting time in Python with Matplotlib
...erstand why this is the 5th question I've encountered where no one has actually TRIED using a scatter plot - it doesn't work. Type Error - invalid type promotion.
– dwanderson
Oct 5 '16 at 16:21
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Can I use a binary literal in C or C++?
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You can use BOOST_BINARY while waiting for C++0x. :) BOOST_BINARY arguably has an advantage over template implementation insofar as it can be used in C programs as well (it is 100% preprocessor-driven.)
To do the converse (i.e. print out a ...
SQLite in Android How to update a specific row
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It's actually a walk-around. The Third param of db.update() should be the where clause only, and the fourth is the actual condition values. In this case, the line should be: myDB.update(TableName, cv, "_id=?", new String[]{id}). SQLit...
In Python, if I return inside a “with” block, will the file still close?
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@RikPoggi os._exit is sometimes used - it exits the Python process without calling cleanup handlers.
– Acumenus
Oct 8 '16 at 6:25
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Pretty print in MongoDB shell as default
...y, everything is output to a single line and it's difficult to read, especially with nested arrays and documents.
8 Answers...
What's wrong with nullable columns in composite primary keys?
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Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to the input.
Per definition, NULL cannot be part of a successful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work.
Additonally, NULL is al...