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What are the differences between Perl, Python, AWK and sed? [closed]
...unced "tim-toady"). Perl has 'objects', but it is more of an add-on than a fundamental part of the language.
Python was written last, and probably in part as a reaction to Perl. It has some interesting syntactic ideas (indenting to indicate levels - no braces or equivalents). It is more fundamental...
What are the use cases of Graph-based Databases (http://neo4j.org/)? [closed]
...odel were rapid development time and flexibility. We could quickly add new functionality without impacting existing deployments. If a potential customer wanted to import some of their own data and graft it on top of our model, it could usually be done on site by the sales rep. Flexibility also helpe...
What's the difference between faking, mocking, and stubbing?
...n:
Fake: We acquire or build a very lightweight implementation of the same functionality as provided by a component that the SUT depends on and instruct the SUT to use it instead of the real.
Stub : This implementation is configured to respond to calls from the SUT with the values (or exceptions) th...
How to determine if a number is a prime with regex?
...mitted for clarity), the above regex is identical to the original.
More fun regex
The following regex uses similar technique; it should be educational:
System.out.println(
"OhMyGod=MyMyMyOhGodOhGodOhGod"
.replaceAll("^(.+)(.+)(.+)=(\\1|\\2|\\3)+$", "$1! $2! $3!")
); // prints "Oh! M...
Why and How to avoid Event Handler memory leaks?
...ds a reference to object B, then, it will mean, object A needs object B to function, right? So, the garbage collector won't collect the object B as long as the object A is alive in the memory.
I think this part should be obvious to a developer.
+= Means, injecting reference of Right side object to...
Is it better to specify source files with GLOB or each file individually in CMake?
...ifftool files are stored as $basename.$ext.$type.$pid.$ext which can cause fun errors when trying to compile after a single merge resolution.
– mathstuf
Mar 4 '13 at 21:43
9
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What is the formal difference in Scala between braces and parentheses, and when should they be used?
What is the formal difference between passing arguments to functions in parentheses () and in braces {} ?
9 Answers
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What are free monads?
...re accessible explanation.
Free monads are just a general way of turning functors into monads. That is, given any functor f Free f is a monad. This would not be very useful, except you get a pair of functions
liftFree :: Functor f => f a -> Free f a
foldFree :: Functor f => (f r -> ...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...用 隐私策略和使用条款 技术支持 service@fun123.cn
What does Ruby have that Python doesn't, and vice versa?
..., 2, 3, 4].each{ |e| puts e + 5 }
> [6, 7, 8, 9]
Python has anonymous functions/closures/lambdas, but it doesn't quite have blocks since it's missing some of the useful syntactic sugar. However, there's at least one way to get it in an ad-hoc fashion. See, for example, here.
...