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Bash tool to get nth line from a file
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head and pipe with tail will be slow for a huge file. I would suggest sed like this:
sed 'NUMq;d' file
Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file.
Ex...
Pandas DataFrame Groupby two columns and get counts
I have a pandas dataframe in the following format:
6 Answers
6
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How can I combine flexbox and vertical scroll in a full-height app?
...xbox. I found what I want using old flexbox layout module ( display: box; and other things) in this link: CSS3 Flexbox full-height app and overflow
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C dynamically growing array
I have a program that reads a "raw" list of in-game entities, and I intend to make an array holding an index number (int) of an indeterminate number of entities, for processing various things. I would like to avoid using too much memory or CPU for keeping such indexes...
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Unix command-line JSON parser? [closed]
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You can use this command-line parser (which you could put into a bash alias if you like), using modules built into the Perl core:
perl -MData::Dumper -MJSON::PP=from_json -ne'print Dumper(from_json($_))'
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Using try vs if in python
...er LBYL style ("look before you leap"). To me, it's a matter of efficiency and readability.
In your example (say that instead of returning a list or an empty string, the function were to return a list or None), if you expect that 99 % of the time result will actually contain something iterable, I'd...
Random color generator
Given this function, I want to replace the color with a random color generator.
54 Answers
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TypeScript and field initializers
...ways have come up. Please see the other answers below that have more votes and a better answer. I cannot remove this answer since it's marked as accepted.
Old answer
There is an issue on the TypeScript codeplex that describes this: Support for object initializers.
As stated, you can already do ...
What does the term “porcelain” mean in Git?
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"Porcelain" is the material from which toilets are usually made (and sometimes other fixtures such as washbasins). This is distinct from "plumbing" (the actual pipes and drains), where the porcelain provides a more user-friendly interface to the plumbing.
Git uses this terminology in anal...
Generating random numbers in Objective-C
I'm a Java head mainly, and I want a way to generate a pseudo-random number between 0 and 74. In Java I would use the method:
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