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Best way to test if a row exists in a MySQL table
... Test with ...EXISTS( SELECT 1/0 FROM someothertable). For SQL Server & Oracle - it makes no difference to use *, 1 or NULL because EXISTS only tests for a boolean based on 1+ of the WHERE criteria matching.
– OMG Ponies
Nov 4 '09 at 23:28
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Could not load file or assembly 'xxx' or one of its dependencies. An attempt was made to load a prog
...here. It depends on where the error occurs. If it's through Visual Studio & Cassini web server, Fraser's right. If it occurs in IIS7+, Nicks answer is probably the most likely fix.
– Carl Heinrich Hancke
Jun 1 '12 at 8:29
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Why can I use auto on a private type?
...e itself is still usable, which is why you can return it to client code at all.
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What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?
...
This error message means that you are attempting to use Python 3 to follow an example or run a program that uses the Python 2 print statement:
print "Hello, World!"
The statement above does not work in Python 3. In Python 3 you need to add parentheses around the value to be printed:
p...
What is the purpose of willSet and didSet in Swift?
...e value is modified without needing another field. For instance, in that example:
class Foo {
var myProperty: Int = 0 {
didSet {
print("The value of myProperty changed from \(oldValue) to \(myProperty)")
}
}
}
myProperty prints its old and new value every time ...
How do I replace text in a selection?
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This frustrated the heck out of me, and none of the above answers really got me what I wanted. I finally found the answer I was looking for, on a mac if you do ⌘ + option + F it will bring up a Find-Replace bar at the bottom of your editor which is local to the file you have open.
There is...
Regular Expression: Any character that is NOT a letter or number
...ng that isn't a letter, digit, or an underscore (_) character.
\W
For example in JavaScript:
"(,,@,£,() asdf 345345".replace(/\W/g, ' '); // Output: " asdf 345345"
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Difference between exit() and sys.exit() in Python
... PyObject *exit_code = 0;
if (!PyArg_UnpackTuple(args, "exit", 0, 1, &exit_code))
return NULL;
/* Raise SystemExit so callers may catch it or clean up. */
PyErr_SetObject(PyExc_SystemExit, exit_code);
return NULL;
}
While exit is defined in site.py and _sitebuiltins.py,...
How to list all tags along with the full message in git?
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Try this it will list all the tags along with annotations & 9 lines of message for every tag:
git tag -n9
can also use
git tag -l -n9
if specific tags are to list:
git tag -l -n9 v3.*
(e.g, above command will only display tags starting with "v3.")
-l , --list
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Is it possible to install iOS 6 SDK on Xcode 5?
...s/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs & restart the xcode.
But this might again removed by Xcode if you update xcode.
2) Another way is Unzip and paste where you want and go to /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/...