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How should I have explained the difference between an Interface and an Abstract class?
...implementation of this only:
public abstract void checkDBforUser();
}
Now in each child class, we only need to implement one method - the method that is database dependent.
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How do you find out the type of an object (in Swift)?
...es, it's useful to be able to actually find out what type something is. I know the debugger can show you some type information, and you can usually rely on type inference to get away with not specifying the type in those situations, but still, I'd really like to have something like Python's type()
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Converting a Java collection into a Scala collection
... a more explicit way (using JavaConverters), which seems to be recommended now.
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What is the fastest way to check if a class has a function defined?
...g decorator called "lru_cache" by Raymond Hettinger. A version of this is now standard in the functools module in Python 3.2.
http://code.activestate.com/recipes/498245-lru-and-lfu-cache-decorators/
http://docs.python.org/release/3.2/library/functools.html
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There is already an open DataReader associated with this Command which must be closed first
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I have had this error so many times now... and every time I forget! The answer to the question is always to use ToList().
– Cheesus Toast
Jul 21 '15 at 19:24
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hasNext in Python iterators?
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@Giorgio, there is no way to know whether another element exists without executing the code that generates it (you don't know whether the generator will execute yield or not). It is, of course, not difficult to write an adaptor that stores the result of n...
How to compare strings in Bash
... true.
(
[ "$x" == "valid" ]
&&
echo "valid"
)
||
echo "invalid"
Now, when it is evaluated, the first is checked. If it is false, than the second operand of the logic and && after it is not relevant. The first is not true, so it can not be the first and the second be true, anyway.
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How do I get the path of the assembly the code is in?
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Did not know you could put static before public. Nice to know and i think i prefer for readability
– Valamas
Jul 3 '13 at 4:27
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What use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
I'm trying to get a cross-plattform build system working using CMake. Now the software has a few dependencies. I compiled them myself and installed them on my system.
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outline on only one border
...nset border into an HTML element, but just only on one side of it.
Until now, I've been using an image to do that (GIF/PNG) that I would then use as a background and stretch it (repeat-x) and position a little off from the top of my block.
Recently, I discovered the outline CSS property, which i...