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Case objects vs Enumerations in Scala
...ts you have. The answer can be reduced down to three basic patterns.
To start, let's make sure we are working from the same basic idea of what an enumeration is. Let's define an enumeration mostly in terms of the Enum provided as of Java 5 (1.5):
It contains a naturally ordered closed set of na...
What's the difference(s) between .ToList(), .AsEnumerable(), AsQueryable()?
...tion is local including AsQueryable(). You can't switch to remote once you start executing locally.
Hope this makes it a little bit more clearer.
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git merge: apply changes to code that moved to a different file
... \
`--A---B--- (local)
Create a throwaway branch move at the starting point of your changes with git branch move X. That is to say, put the move branch at commit X, the one before the commits you want to merge; most likely, this is the commit from which you branched out to implement yo...
Is there a way to detect if an image is blurry?
... Also tried your suggestion, but the numbers I get are a bit random. If I start a new question with regards to this particular implementation, would you care to take a look?\
– Stpn
Jun 3 '13 at 19:28
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Get operating system info
I recently started wondering about sites like http://thismachine.info/ that get the user's operating system info. I have not been able to find out how to do that with PHP, and wanted to try to figure it out.
...
Best explanation for languages without null
...+
p.middleName.map{length}.getOrElse(0) +
p.lastName.length
When you start dealing with List of Options, it gets even better. Imagine that the List people is itself optional:
people flatMap(_ find (_.firstName == "joe")) map (fullNameLength)
How does this work?
//convert an Option[List[Pe...
How to explain callbacks in plain english? How are they different from calling one function from ano
...e the term "callback" makes the most obvious sense. Once an i/o process is started (like asking for a file to be read from disk or a server to return data from an http request) an asynchronous program doesn't wait around for it to finish. It can go ahead with whatever tasks are scheduled next, and o...
What are the differences between NP, NP-Complete and NP-Hard?
...e coloured using two colours so that no edge is monochromatic?
Algorithm: start with an arbitrary vertex, color it red and all of its neighbours blue and continue. Stop when you run out of vertices or you are forced to make an edge have both of its endpoints be the same color.
NP
NP is a comple...
How do CDI and EJB compare? interact?
...rify from an EJB spec perspective we made the deliberate decision from the start of CDI to require that EJB implementations must support 100% of the CDI feature set on EJBs. Every aspect of CDI works on EJBs with the exception of scopes which we had to limit to Stateful beans only.
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Lock-free multi-threading is for real threading experts
...ving this from a single thread. You will, however run into issues when you start to do multi-threading on multiple cores. Your intuitions will break down: just because an instruction is earlier in your code, it does not mean that it will actually happen earlier. CPUs can process instructions out of ...