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MySQL vs MySQLi when using PHP [closed]
...It should also be noted that MySQLi only works with MySQL 5+. This isn't really relevant anymore, but when MySQLi came out, MySQL 4 was still the standard. This is part of the reason the extensions are separate, the old MySQL driver staying there for compatibility purposes.
– z...
Using vagrant to run virtual machines with desktop environment
...ld solve us the problem that everyone have different software versions installed in the VM.
11 Answers
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Android SDK on a 64-bit linux machine
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Yes, it is. You need to install the ia32 libraries. Check out the Ubuntu Linux troubleshooting section.
apt-get install ia32-libs
apt-get install sun-java6-jdk
share
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Showing empty view when ListView is empty
... when the ListView is not empty. I thought the ListView would automatically detect when to show the empty view.
11 Answ...
Why use static_cast(x) instead of (int)x?
...e main reason is that classic C casts make no distinction between what we call static_cast<>(), reinterpret_cast<>(), const_cast<>(), and dynamic_cast<>(). These four things are completely different.
A static_cast<>() is usually safe. There is a valid conversion in the...
How can I return pivot table output in MySQL?
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This basically is a pivot table.
A nice tutorial on how to achieve this can be found here: http://www.artfulsoftware.com/infotree/qrytip.php?id=78
I advise reading this post and adapt this solution to your needs.
Update
After the l...
Hidden features of Scala
... more. Every Regex object in Scala has an extractor (see answer from oxbox_lakes above) that gives you access to the match groups. So you can do something like:
// Regex to split a date in the format Y/M/D.
val regex = "(\\d+)/(\\d+)/(\\d+)".r
val regex(year, month, day) = "2010/1/13"
The secon...
Are Javascript arrays sparse?
...ript arrays are implemented differs from browser to browser, but they generally fall back to a sparse implementation - most likely the same one used for property access of regular objects - if using an actual array would be inefficient.
You'll have to ask someone with more knowledge about specific ...
no new variables on left side of :=
...e is also a "short variable declaration" ( http://golang.org/ref/spec#Short_variable_declarations ) which means that in the left we need to have at least a new variable declaration for it to be correct.
You can change the second to a simple assignment statement := -> = or you can use a new varia...
Which is the fastest algorithm to find prime numbers?
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Actually I don't think primegen is the fastest, or even the second-fastest; yafu and primesieve are both faster in general, I think, and certainly over 2^32. Both are (modified) sieves of Eratosthenes rather than the Atkin-Berns...