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Python circular importing?
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I think the answer by jpmc26, while by no means wrong, comes down too heavily on circular imports. They can work just fine, if you set them up correctly.
The easiest way to do so is to use import my_module syntax, rather than from my_module import some_object. The former will al...
What is external linkage and internal linkage?
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When you write an implementation file (.cpp, .cxx, etc) your compiler generates a translation unit. This is the source file from your implementation plus all the headers you #included in it.
Internal linkage refers to everything only in scope of a translation unit.
External linkage ...
Make git automatically remove trailing whitespace before committing
...atically remove trailing whitespace (and other whitespace errors) from all commits as they are applied.
16 Answers
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Haskell: How is pronounced? [closed]
...practice is a way to lift arbitrary functions into a Functor. Consider the combination of Maybe (arguably the simplest non-trivial Functor) and Bool (likewise the simplest non-trivial data type).
maybeNot :: Maybe Bool -> Maybe Bool
maybeNot = fmap not
The function fmap lets us lift not from w...
How to check if PHP array is associative or sequential?
...rrays as associative, so there aren't any built in functions. Can anyone recommend a fairly efficient way to check if an array contains only numeric keys?
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In C#, why is String a reference type that behaves like a value type?
...istics of a value type such as being immutable and having == overloaded to compare the text rather than making sure they reference the same object.
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What are the disadvantages to declaring Scala case classes?
...se class. That's the restriction.
Other advantages you missed, listed for completeness: compliant serialization/deserialization, no need to use "new" keyword to create.
I prefer non-case classes for objects with mutable state, private state, or no state (e.g. most singleton components). Case clas...
Getting an element from a Set
... exactly what a set should be all about. In my case, I'd like to get some complex object from a set by key (String). This String is encapsulated (and unique) to the object being mapped. In fact, the whole object 'revolves' around said key. Furthermore, the caller knows said String, but not the obje...
What is the difference between concurrency and parallelism?
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Concurrency is when two or more tasks can start, run, and complete in overlapping time periods. It doesn't necessarily mean they'll ever both be running at the same instant. For example, multitasking on a single-core machine.
Parallelism is when tasks literally run at the same ti...
What are good alternatives to SQL (the language)? [closed]
...h is now called Slick) and rewrote the entire system and every 6 queries become 1, just because you could encapsulate and have local methods! If anyone is suffering from SQL horrors, look up Scala Slick or Quill and prepare for enlightenment!
– ChoppyTheLumberjack
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