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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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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 ...
Ball to Ball Collision - Detection and Handling
With the help of the Stack Overflow community I've written a pretty basic-but fun physics simulator.
14 Answers
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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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Get visible items in RecyclerView
...tener.onScroll(...) method on ListViews. I tried to work with View.getGlobalVisibleRect(...) , but that hack is too ugly and does not always work too.
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What is self-documenting code and can it replace well documented code? [closed]
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In my opinion, any code should be self-documenting. In good, self-documented code, you don't have to explain every single line because every identifier (variable, method, class) has a clear semantic name. Having more comments than necessary actually makes ...
Why is list initialization (using curly braces) better than the alternatives?
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Basically copying and pasting from Bjarne Stroustrup's "The C++ Programming Language 4th Edition":
List initialization does not allow narrowing (§iso.8.5.4). That is:
An integer cannot be converted to another integer that...
What is the C# Using block and why should I use it? [duplicate]
What is the purpose of the Using block in C#? How is it different from a local variable?
9 Answers
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getting the last item in a javascript object
If I have an object like:
14 Answers
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