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How do I get SUM function in MySQL to return '0' if no values are found?
Say I have a simple function in MySQL:
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Get pandas.read_csv to read empty values as empty string instead of nan
I'm using the pandas library to read in some CSV data. In my data, certain columns contain strings. The string "nan" is a possible value, as is an empty string. I managed to get pandas to read "nan" as a string, but I can't figure out how to get it not to read an empty value as NaN. Here's sam...
Left align and right align within div in Bootstrap
What are some of the common ways to left align some text and right align some other text within a div container in bootstrap?
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Ruby send vs __send__
I understand the concept of some_instance.send but I'm trying to figure out why you can call this both ways. The Ruby Koans imply that there is some reason beyond providing lots of different ways to do the same thing. Here are the two examples of usage:
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What does 'wb' mean in this code, using Python?
Code:
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CPU Privilege Rings: Why rings 1 and 2 aren't used?
A couple of questions regarding the x86 CPU privilege rings:
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Case insensitive access for generic dictionary
I have an application that use managed dlls. One of those dlls return a generic dictionary:
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Following git-flow how should you handle a hotfix of an earlier release?
If you try to follow the git-flow branching model, documented here and with tools here , how should you handle this situation:
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sed: print only matching group
...rab the last two numbers (one int, one float; followed by optional whitespace) and print only them.
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When should I use perror(“…”) and fprintf(stderr, “…”)?
Reading the man pages and some code did not really help me in
understanding the difference between - or better, when I should use - perror("...") or fprintf(stderr, "...") .
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