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How do you get the logical xor of two variables in Python?
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If you're already normalizing the inputs to booleans, then != is xor.
bool(a) != bool(b)
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R object identification
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In case you haven't seen it already, "S4 objects in 15 pages or less" [ stat.auckland.ac.nz/S-Workshop/Gentleman/S4Objects.pdf ] is another good read (with more details).
– ars
Jul 24 '09 at 23:02
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What's the difference between “version number” in iTunes Connect, “bundle version”, “bundle version
... uploading a new build, we got an error indicating the build version was already uploaded.
After reading a few SO links and Apple docs, my understanding was to make the bundle version: 1.2.8.001, while maintaing bundle-version-short the way it was. If a new build is required, we increment bundle-v...
Shrink a YouTube video to responsive width
... the detail explanation on the number 56.25% and 25px can be read at alistapart.com/article/creating-intrinsic-ratios-for-video padding-bottom: 56.25%: To create a 16:9 ratio, we must divide 9 by 16 (0.5625 or 56.25%). padding-top: 25px: To avoid issues with the broken box mo...
Git: Discard all changes on a diverged local branch
...d your way home if you "accidentally" issued this command without actually reading what it does. :)
– dbn
Dec 19 '12 at 0:25
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How can I exclude directories from grep -R?
...UTION 2 (using the --exclude-dir option of grep):
You know this solution already, but I add it since it's the most recent and efficient solution. Note this is a less portable solution but more human-readable.
grep -R --exclude-dir=node_modules 'some pattern' /path/to/search
To exclude multiple dire...
Difference between app.use and app.get in express.js
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It's not that simple. Read other answers.
– David Lopez
Jun 17 at 16:24
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Why should I use IHttpActionResult instead of HttpResponseMessage?
...plemented however, the ordering of those ActionFilters is not obvious when reading the action method which is one reason I'm not a fan of action filters.
However, by creating an IHttpActionResult that can be explicitly chained in your action method you can compose all kinds of different behaviour t...
How can I get the font size and font name of a UILabel?
...h I set a font size and a font name with Interface Builder. Now I have to read the values of both in my ViewController.
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MongoDB or CouchDB - fit for production? [closed]
I was wondering if anyone can tell me if MongoDB or CouchDB are ready for a production environment.
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