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List distinct values in a vector in R
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edited Jan 21 at 14:05
Gregor Thomas
92.1k1515 gold badges126126 silver badges235235 bronze badges
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When should one use a 'www' subdomain?
... you are just throwing your traffic away to the browers search engine (DNS Error)
Actually it is amazing how many domains out there, especially amongst the top 100, correctly resolve for www.domainname.com but not domainname.com
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How do I alter the position of a column in a PostgreSQL database table?
...ccepted answer!
– juan
Aug 20 at 19:05
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What is the difference between FragmentPagerAdapter and FragmentStatePagerAdapter?
...anuelEmmanuel
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Visual Studio TFS shows unchanged files in the list of pending changes
... prompt of the Developer Command Prompt (and getting a workspace not found error), before navigating to the workspace folder and executing there. If I go straight to the correct folder, the command is not found. (I wouldn't mind a solution to that issue in itself.)
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Guards vs. if-then-else vs. cases in Haskell
...turn ()
handle (ExitFailure code)
| code < 0 = putStrLn . ("internal error " ++) . show . abs $ code
| otherwise = putStrLn . ("user error " ++) . show $ code
BTW. As a style tip, always make a newline after a = or before a | if the stuff after the =/| is too long for one line, o...
What is the difference between concurrent programming and parallel programming?
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https://joearms.github.io/published/2013-04-05-concurrent-and-parallel-programming.html
Concurrent = Two queues and one coffee machine.
Parallel = Two queues and two coffee machines.
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What is this crazy C++11 syntax ==> struct : bar {} foo {};?
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struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate the UDT at the same time that we define it:
struct foo { foo() { cout << "!"; } }; // just a defini...
Best way to encode text data for XML in Java?
...ent.
– Mads Hansen
May 16 '09 at 16:05
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@Mads, using CDATA results in a valid XML file so it is ...
What is the most efficient way to store a list in the Django models?
...d.
– Dheeraj M Pai
Dec 21 '19 at 18:05
See docs.djangoproject.com/en/3.0/topics/db/examples/many_to_one
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