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Why is the use of tuples in C++ not more common?
...hy does nobody seem to use tuples in C++, either the Boost Tuple Library or the standard library for TR1? I have read a lot of C++ code, and very rarely do I see the use of tuples, but I often see lots of places where tuples would solve many problems (usually returning multiple values from functio...
Where does VBA Debug.Print log to?
... This is true if you are in an office application which supports VBA, but if you are using via WSH you may need to use MsgBox (shudder) or some similar technique as the immediate window is not available.
– AJ.
May 26 '10 at 20:09
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jQuery: keyPress Backspace won't fire?
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Why would keyup fire for Backspace when keypress won't?
– Aaron Digulla
Jan 14 '11 at 11:11
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Providing a default value for an Optional in Swift?
The idiom for dealing with optionals in Swift seems excessively verbose, if all you want to do is provide a default value in the case where it's nil:
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What is an abstract class in PHP?
...e purpose of this is to provide a kind of template to inherit from and to force the inheriting class to implement the abstract methods.
An abstract class thus is something between a regular class and a pure interface. Also interfaces are a special case of abstract classes where ALL methods are abst...
Why #egg=foo when pip-installing from git repo
...nstall -e ..." to install from a git repo, I have to specify #egg=somename or pip complains. For example:
4 Answers
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Running multiple commands in one line in shell
...direct the output of a command into another command. What you are looking for is && operator to execute the next command only if the previous one succeeded:
cp /templates/apple /templates/used && cp /templates/apple /templates/inuse && rm /templates/apple
Or
cp /template...
What integer hash function are good that accepts an integer hash key?
...4435761 mod 2^32
In general, you should pick a multiplier that is in the order of your hash size (2^32 in the example) and has no common factors with it. This way the hash function covers all your hash space uniformly.
Edit: The biggest disadvantage of this hash function is that it preserves divi...
dd: How to calculate optimal blocksize? [closed]
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The optimal block size depends on various factors, including the operating system (and its version), and the various hardware buses and disks involved. Several Unix-like systems (including Linux and at least some flavors of BSD) define the st_blksize member in the struct...
Start service in Android
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Probably you don't have the service in your manifest, or it does not have an <intent-filter> that matches your action. Examining LogCat (via adb logcat, DDMS, or the DDMS perspective in Eclipse) should turn up some warnings that may help.
More likely, you should start th...