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Transpose a data frame
...ile the name column is in it - all numeric values will then be turned into strings!
Here's a solution that keeps numbers as numbers:
# first remember the names
n <- df.aree$name
# transpose all but the first column (name)
df.aree <- as.data.frame(t(df.aree[,-1]))
colnames(df.aree) <- n
d...
How to start two threads at “exactly” the same time
...CountDownLatch;
public class ThreadExample
{
public static void main(String[] args)
{
CountDownLatch latch = new CountDownLatch(1);
MyThread t1 = new MyThread(latch);
MyThread t2 = new MyThread(latch);
new Thread(t1).start();
new Thread(t2).start();...
Objective-C pass block as parameter
...ou can certainly pass a strongly-typed argument such as NSNumber * or std::string& or anything else you could pass as a function argument. This is just an example. (For a block that's equivalent except for replacing id with NSNumber, the typedef would be typedef void (^ IteratorWithNumberBlock)(...
How to change the background color of a UIButton while it's highlighted?
...hlighted UIButton (for example when a user has his finger on the button) and I need to change the background color while the button is highlighted (so while the finger of the user is still on the button).
...
MbUnit under Linux, used within an F# project?
...es not read his email very often :-) Seeing as SO has tags for both Gallio and MbUnit, I thought it was worth asking here.
...
Escaping ampersand in URL
I am trying to send a GET message that contains strings with ampersands and can't figure how to escape the ampersand in the URL.
...
How to wrap async function calls into a sync function in Node.js or Javascript?
...sole.log(res);
});
}
I like arrow function definitions more. But any string of the form "() => {...}" could also be written as "function () {...}"
So topDog is not async despite calling an async function.
EDIT: I realize a lot of the times you need to wrap an async function inside a syn...
Command line to remove an environment variable from the OS level configuration
...Ptr SendMessageTimeout(
IntPtr hWnd, uint Msg, UIntPtr wParam, string lParam,
uint fuFlags, uint uTimeout, out UIntPtr lpdwResult);
"@
}
$HWND_BROADCAST = [intptr]0xffff;
$WM_SETTINGCHANGE = 0x1a;
$result = [uintptr]::zero
[win32.nativemethods]::SendMessageTimeout($...
How to use a WSDL
...use (you will use all the settings except the URL), and the remoteURL is a string representing the URL to connect to (instead of the one contained in the config).
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Xcode 4 - build output directory
... grep SYMROOT | cut -d "=" -f 2 - | sed 's/^ *//'
The last part cuts the string at the equal sign and then trims the whitespace at the beginning.
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