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Is List a subclass of List? Why are Java generics not implicitly polymorphic?
...nimals = dogs; // Awooga awooga
animals.add(new Cat());
Dog dog = dogs.get(0); // This should be safe, right?
Suddenly you have a very confused cat.
Now, you can't add a Cat to a List<? extends Animal> because you don't know it's a List<Cat>. You can retrieve a value and know that it ...
How to return multiple values? [duplicate]
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biniam
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answered Dec 19 '11 at 6:10
Aravind YarramAravind...
In Python, how can you load YAML mappings as OrderedDicts?
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edited Oct 4 '18 at 16:09
answered Feb 20 '14 at 15:47
c...
Detect changes in the DOM
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2015 update, new MutationObserver is supported by modern browsers:
Chrome 18+, Firefox 14+, IE 11+, Safari 6+
If you need to support older ones, you may try to fall back to other approaches like the ones mentioned in this ...
jQuery parent of a parent
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answered Jun 8 '09 at 19:11
Paolo BergantinoPaolo Bergantino
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How to compile python script to binary executable
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answered Sep 9 '12 at 14:02
zenpoyzenpoy
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Debugging Scala code with simple-build-tool (sbt) and IntelliJ
... like
-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
Launch sbt with these arguments and then execute jetty-run. Finally, launch your remote debug configuration in IntelliJ. This thread might be useful.
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How to keep a git branch in sync with master
...-Rebasing
– concept47
May 2 '13 at 10:19
2
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How to skip over an element in .map()?
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answered Jul 17 '14 at 14:50
PointyPointy
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C++ - passing references to std::shared_ptr or boost::shared_ptr
...d_message(std::shared_ptr<std::string> msg)
{
previous_message = 0;
std::cout << *msg << std::endl;
previous_message = msg;
}
So, before we start sending we discard the current previous message, and then after the send is complete we can store the new previous message...