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What's the absurd function in Data.Void useful for?
...simple (Left x) = absurd x
simple (Right y) = y
This turns out to be somewhat useful. Consider a simple type for Pipes
data Pipe a b r
= Pure r
| Await (a -> Pipe a b r)
| Yield !b (Pipe a b r)
this is a strict-ified and simplified version of the standard pipes type from Gabriel Gonza...
What does the KEY keyword mean?
..._id) REFERENCES auth_user (id) then you might additionally want to specify what INDEX is used (HASH vs BTREE). This example shows KEY and INDEX aren't synonyms.
– oneloop
Jan 31 '17 at 12:19
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What are sessions? How do they work?
...er) that contains the authenticated user id - that way your code will know what user it is talking to.
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Git command to show which specific files are ignored by .gitignore
...to be upvoted) git clean -ndX works on older gits, displaying a preview of what ignored files could be removed (without removing anything)
Also interesting (mentioned in qwertymk's answer), you can also use the git check-ignore -v command, at least on Unix (doesn't work in a CMD Windows session)...
What's the result of += in C and C++?
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What does PermGen actually stand for?
I know what PermGen is, what it's used for, why it fails, how to increase it etc.
8 Answers
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What are Aggregates and PODs and how/why are they special?
...For other C++ standards see:
C++11 changes
C++14 changes
C++17 changes
What are aggregates and why they are special
Formal definition from the C++ standard (C++03 8.5.1 §1):
An aggregate is an array or a class (clause 9) with no user-declared
constructors (12.1), no private or protecte...
PowerShell script to return versions of .NET Framework on a machine?
What would a PowerShell script be to return versions of the .NET Framework on a machine?
16 Answers
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What is the main difference between Inheritance and Polymorphism?
...a and both definitions seemed to be exactly the same. I was just wondering what the MAIN difference was for my own piece of mind. I know there are a number of similar questions to this but, none I have seen which provide a definitive answer.
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What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
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