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Python matplotlib multiple bars
....show()
I don't know what's the "y values are also overlapping" means, does the following code solve your problem?
ax = plt.subplot(111)
w = 0.3
ax.bar(x-w, y, width=w, color='b', align='center')
ax.bar(x, z, width=w, color='g', align='center')
ax.bar(x+w, k, width=w, color='r', align='center')...
Using python's eval() vs. ast.literal_eval()?
...tting the user input a plain dictionary, use ast.literal_eval(). It safely does what you want and nothing more.
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Using python map and other functional tools
...r with other functional languages? i.e. are you trying to learn how python does functional programming, or are you trying to learn about functional programming and using python as the vehicle?
Also, do you understand list comprehensions?
map(f, sequence)
is directly equivalent (*) to:
[f(x) for...
Using module 'subprocess' with timeout
...tput() is the preferred way to get output (it returns the output directly, doesn't ignore errors, it is available since forever). 2- run() is more flexible but run() ignores error by default and requires additional steps to get output 3- check_output() is implemented in terms of run() and therefore...
Generate random numbers following a normal distribution in C/C++
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Note, C++11 adds std::normal_distribution which does exactly what you ask for without delving into mathematical details.
– user283145
Aug 28 '13 at 9:50
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Avoiding instanceof in Java
...keep it buttoned up in one method (or at most one class) so that the smell doesn't leak out.
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Differences between utf8 and latin1
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Mysql 5.1 supports 3 byte UTF-8, however Mysql 5.5 does support 4 byte UTF-8 as utf8mb4.
– velcrow
Aug 22 '11 at 18:02
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How do I get a value of datetime.today() in Python that is “timezone aware”?
...nice way to do it is:
datetime.now(pytz.utc)
which is a bit shorter and does the same.
Further reading/watching why to prefer UTC in many cases:
pytz documentation
What Every Developer Should Know About Time – development hints for many real-life use cases
The Problem with Time & Timez...
Event handling for iOS - how hitTest:withEvent: and pointInside:withEvent: are related?
...re is my answer.
The implementation of hitTest:withEvent: in UIResponder does the following:
It calls pointInside:withEvent: of self
If the return is NO, hitTest:withEvent: returns nil. the end of the story.
If the return is YES, it sends hitTest:withEvent: messages to its subviews.
it starts fr...
What is N-Tier architecture?
...o at least cross the process boundary. Or else it's called layers. But, it does not need to be in physically different machines. Although I don't recommend it, you can host logical tier and database on the same box.
Edit: One implication is that presentation tier and the logic tier (sometimes cal...