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How to handle command-line arguments in PowerShell
What is the "best" way to handle command-line arguments?
1 Answer
1
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Select random row from a sqlite table
I have a sqlite table with the following schema:
7 Answers
7
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Big O, how do you calculate/approximate it?
Most people with a degree in CS will certainly know what Big O stands for .
It helps us to measure how well an algorithm scales.
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Drop rows with all zeros in pandas data frame
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It turns out this can be nicely expressed in a vectorized fashion:
> df = pd.DataFrame({'a':[0,0,1,1], 'b':[0,1,0,1]})
> df = df[(df.T != 0).any()]
> df
a b
1 0 1
2 1 0
3 1 1
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Java 8 Stream and operation on arrays
I have just discovered the new Java 8 stream capabilities. Coming from Python, I was wondering if there was now a neat way to do operations on arrays like summing, multiplying two arrays in a "one line pythonic" way ?
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Remove carriage return in Unix
...an carriage returns (CR, "\r", 0x0d) at the ends of lines rather than just blindly within a file (you may have them in the middle of strings for all I know). Using this test file with a CR at the end of the first line only:
$ cat infile
hello
goodbye
$ cat infile | od -c
0000000 h e l l ...
How can I map True/False to 1/0 in a Pandas DataFrame?
I have a column in python pandas DataFrame that has boolean True/False values, but for further calculations I need 1/0 representation. Is there a quick pandas/numpy way to do that?
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How do JavaScript closures work?
...h a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves?
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Cocoa Touch: How To Change UIView's Border Color And Thickness?
I saw in the inspector that I can change the background color, but I'd like to also change the border color and thickness, is this possible?
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What is the quickest way to HTTP GET in Python?
What is the quickest way to HTTP GET in Python if I know the content will be a string? I am searching the documentation for a quick one-liner like:
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