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Python: Select subset from list based on index set
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@PreludeAndFugue: If there are two equivalent options it's good to know which one is faster, and use that one right away.
– fuenfundachtzig
Jul 5 '10 at 11:42
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Is Big O(logn) log base e?
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Kinopkio and bcat, thanks for helping it become useful. It was not very well-written at first. :)
– Heath Hunnicutt
Oct 15 '09 at 1:04
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Matplotlib Legends not working
...uple of line objects, no matter how many are actually created from the command. Without the comma, "plot1" and "plot2" are tuples instead of line objects, making the later call to plt.legend() fail.
The comma implicitly unpacks the results so that instead of a tuple, "plot1" and "plot2" automatica...
Make a negative number positive
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The concept you are describing is called "absolute value", and Java has a function called Math.abs to do it for you. Or you could avoid the function call and do it yourself:
number = (number < 0 ? -number : number);
or
if (number < 0)
number = -number;
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Sorting arrays in NumPy by column
...initially define your array with fields...
As a quick example, to sort it and return a copy:
In [1]: import numpy as np
In [2]: a = np.array([[1,2,3],[4,5,6],[0,0,1]])
In [3]: np.sort(a.view('i8,i8,i8'), order=['f1'], axis=0).view(np.int)
Out[3]:
array([[0, 0, 1],
[1, 2, 3],
[4, 5...
How to run a hello.js file in Node.js on windows?
...run the "Hello World" example found at http://nodejs.org/. This is a quick and dirty example. For a permanent installation you'd want to store the executable in a more reasonable place than the root directory and update your PATH to include its location.
Download the Windows executable here: http:...
Descending order by date filter in AngularJs
So the book comes from rest api and it has many readers attached. I want to get the 'recent' reader.
9 Answers
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Run a Docker image as a container
... answered Aug 28 '13 at 21:14
AndyAndy
28.2k44 gold badges3636 silver badges4949 bronze badges
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When to use f:viewAction / preRenderView versus PostConstruct?
... the moment the @PostConstruct runs. In JSF 2.0/2.1, this tag didn't exist and you have to use the preRenderView workaround.
If the backing bean is @RequestScoped, do they effectively do the exact same thing? (and so then it is up to developer choice? (@PostConstruct seems "cleaner").
No, they do ...
What’s the best way to check if a file exists in C++? (cross platform)
... platform) , but I'm wondering if there is a better way to do this using standard c++ libs? Preferably without trying to open the file at all.
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