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Abusing the algebra of algebraic data types - why does this work?
...nked to a paper about that in my answer but I could swear I remember first reading about it on your blog.
– C. A. McCann
Feb 8 '12 at 20:00
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Various ways to remove local Git changes
...It all depends on exactly what you are trying to undo/revert. Start out by reading the post in Ube's link. But to attempt an answer:
Hard reset
git reset --hard [HEAD]
completely remove all staged and unstaged changes to tracked files.
I find myself often using hard resetting, when I'm like "ju...
Java String new line
...tring x = "Hello, %n there"; . Added spaces around %n just for the sake of readability.
– Manoj Shrestha
Jun 1 '18 at 20:06
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Python - How to sort a list of lists by the fourth element in each list? [duplicate]
...he operator module). While some people find itemgetter and attrgetter less readable than lambdas, others use them extensively, so it's at least worth being able to read them and know what they do.
– abarnert
Jul 9 '13 at 18:20
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Http 415 Unsupported Media type error with JSON
...ited Dec 7 '16 at 20:48
Matthew Read
81711 gold badge2626 silver badges4242 bronze badges
answered May 17 '16 at 15:34
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How do servlets work? Instantiation, sessions, shared variables and multithreading
...tore their scoped beans as an attribute of its closest matching scope.
Thread Safety
That said, your major concern is possibly thread safety. You should now know that servlets and filters are shared among all requests. That's the nice thing about Java, it's multithreaded and different threads (re...
What is the difference between sql and mysql [closed]
...MySQL is one of many books holding everything, and SQL is how you go about reading that book.
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public friend swap member function
... and others mistakenly thought would be the case. If you were bit by this, read here.
In short: the member function is just noise, the specialization is ugly and incomplete, but the friend function is complete and works. And when you swap, either use boost::swap or an unqualified swap with std::s...
What do
... not find implicit value for parameter evidence: =:=[Int,String]
You can read that error as "could not find evidence that Int == String"... that's as it should be! getStringLength is imposing further restrictions on the type of A than what Foo in general requires; namely, you can only invoke getSt...
Creating a singleton in Python
...h essentially recreates C-style structs in Python using metaclasses. The thread What are some (concrete) use-cases for metaclasses? also provides some examples, they generally seem to be related to declarative programming, especially as used in ORMs.
In this situation, if you use your Method #2, and...