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How to sort a dataframe by multiple column(s)
...uartile, dot is the median)
Given these results and weighing simplicity vs. speed, I'd have to give the nod to arrange in the plyr package. It has a simple syntax and yet is almost as speedy as the base R commands with their convoluted machinations. Typically brilliant Hadley Wickham work. My ...
Get last field using awk substr
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Was writing a script to work with some docker commands and this did the trick. Thanks!
– Harlin
Apr 11 '19 at 21:26
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How to implement an STL-style iterator and avoid common pitfalls?
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I really don't get the cplusplus vs cppreference dispute, they are both good and missing many things. However, C++ is the only language where implementing standard library iterators is an hell XD. Most times is simpler writing a wrapper class over an stl con...
When to use reinterpret_cast?
I am little confused with the applicability of reinterpret_cast vs static_cast . From what I have read the general rules are to use static cast when the types can be interpreted at compile time hence the word static . This is the cast the C++ compiler uses internally for implicit casts also.
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C# Events and Thread Safety
...es down to just two and a half NANOSECONDS(!!!) per event raised (pre-init vs. classic-null). This would be undetectable in almost apps with real work to do, but given that the vast majority of event usage is in GUI frameworks, you'd have to compare this with the cost of repainting parts of a screen...
Brew doctor says: “Warning: /usr/local/include isn't writable.”
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Ironically that's because the script does exactly what the other answers are suggesting.
– Lightness Races in Orbit
Aug 27 '19 at 16:48
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What is the difference/usage of homebrew, macports or other package installation tools? [closed]
...e detail:
This site suggests using Hombrew: http://deephill.com/macports-vs-homebrew/
whereas this site lists the advantages of using Macports: http://arstechnica.com/civis/viewtopic.php?f=19&t=1207907
I also switched from Ubuntu recently, and I enjoy using homebrew (it's simple and easy to ...
Thin web server: `start_tcp_server': no acceptor (RuntimeError) after git branch checkout
...ails
33240 s003 S+ 0:15.05 /Users/Arta/.rbenv/versions/1.9.2-p290/bin/ruby script/rails s -p 3000
kill it, and run anew:
$ kill -9 33240
$ rails s
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Angularjs minify best practice
...ut that angularjs dependency injection has problems if you minify your javascript
so I'm wondering if instead of
7 Answers
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How do you fix a bad merge, and replay your good commits onto a fixed merge?
...viable alternative:
git-filter-branch allows you to make complex shell-scripted rewrites
of your Git history, but you probably don’t need this flexibility if
you’re simply removing unwanted data like large files or passwords.
For those operations you may want to consider The BFG
Repo...