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JPA : How to convert a native query result set to POJO class collection
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JPA provides an SqlResultSetMapping that allows you to map whatever returns from your native query into an Entity or a custom class.
EDIT JPA 1.0 does not allow mapping to non-entity classes. Only in JPA 2.1 a ConstructorResult has been added to map return values a java class.
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What is the definition of “interface” in object oriented programming
Ok, a friend of mine go back and forth on what "interface" means in programming.
16 Answers
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List comprehension vs map
...want to use a list comprehension in python because it will be more obvious what you're doing to novice programmers reading your code. (This does not apply to other languages, where other idioms may apply.) It will even be more obvious what you're doing to python programmers, since list comprehension...
How to optimize for-comprehensions and loops in Scala?
...blems in Scala that I originally tackled in Java. Specifically Problem 5: "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?"
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What are the main purposes of using std::forward and which problems it solves?
...rt the named rvalue references t1 and t2 to unnamed rvalue references. What is the purpose of doing that? How would that affect the called function inner if we leave t1 & t2 as lvalues?
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How do I seed a random class to avoid getting duplicate random values [duplicate]
... Hi, I have got a confusion about the word 'Seed', How does it work? and what is the impact that it has on the Random Class in Java.util
– gmhk
Feb 23 '10 at 8:10
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Malloc vs new — different padding
...he difference could result in errors transferring data.
Is there any sign what the author of that comment thinks about objects on the stack or in globals, whether in his opinion they're "padded like malloc" or "padded like new"? That might give clues to where the idea came from.
Maybe he's confuse...
How do you test to see if a double is equal to NaN?
I have a double in Java and I want to check if it is NaN .
What is the best way to do this?
7 Answers
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Google Guava vs. Apache Commons [closed]
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What I really wonder: why are there no other opinions? Should I be playing the devils advocate? Apache Commons Collections is not a bad library, after all.
– Joachim Sauer
Sep 20 '09 at ...
How to limit the amount of concurrent async I/O operations?
...ecent blog post about the new .NET 4.5 goodies that came out with beta see What’s New for Parallelism in .NET 4.5 Beta.
Last, here's some sample code about how to use SemaphoreSlim for async method throttling:
public async Task MyOuterMethod()
{
// let's say there is a list of 1000+ URLs
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