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Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
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By "the contents of your []", I am talking specifically about the code in the Question. This syntax quirk was not necessary at all, the same thing can be achieved by using pointer syntax, i.e. if a pointer is passed then req...
What is the proper way to re-attach detached objects in Hibernate?
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An obvious step in the object lifecycle is not available to you.
Judging by the number of similar questions about JPA,
it seems that even if JPA does claim to have a coherent model,
it most certainly does not match the mental model of most programmers,
who have been cursed to waste many hours try...
How to name and retrieve a stash by name in git?
I was always under the impression that you could give a stash a name by doing git stash save stashname , which you could later on apply by doing git stash apply stashname . But it seems that in this case all that happens is that stashname will be used as the stash description.
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Performance optimization strategies of last resort [closed]
...perience. I tried to explain this in a Dr. Dobbs article in November 1993, by starting from a conventionally well-designed non-trivial program with no obvious waste and taking it through a series of optimizations until its wall-clock time was reduced from 48 seconds to 1.1 seconds, and the source co...
Performance of Java matrix math libraries? [closed]
We are computing something whose runtime is bound by matrix operations. (Some details below if interested.) This experience prompted the following question:
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Is there a short cut for going back to the beginning of a file by vi editor?
When reading a long file by vi editor, it would be very nice to get back to the beginning of the file by some short cuts when you really need to do so. Even ctrl + B sometimes is too slow. Does anyone know such a tool?
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Stop/Close webcam which is opened by navigator.getUserMedia
I opened a webcam by using the following JavaScript code: navigator.getUserMedia
16 Answers
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SQL to find the number of distinct values in a column
... also works on groups select A,COUNT(DISTINCT B) from table group by A
– tmanthey
Apr 18 '13 at 15:07
7
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How to determine if a point is in a 2D triangle? [closed]
...ite optimal) algorithm is checking on which side of the half-plane created by the edges the point is.
Here's some high quality info in this topic on GameDev, including performance issues.
And here's some code to get you started:
float sign (fPoint p1, fPoint p2, fPoint p3)
{
return (p1.x - p3...
Access denied for user 'root'@'localhost' while attempting to grant privileges. How do I grant privi
...Those access denied error shows up again.
I managed to solve this problem by fixing the privileges by the following command on the MySQL server bin/ directory as mentioned in here:
C:\MySQL Server 5.5\bin> mysql_upgrade
Then, the problem gone away. I hope this solution works on Linux too sinc...