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Applying a function to every row of a table using dplyr?
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As of dplyr 0.2 (I think) rowwise() is implemented, so the answer to this problem becomes:
iris %>%
rowwise() %>%
mutate(Max.Len= max(Sepal.Length,Petal.Length))
Non rowwise alternative
Five years (!) later this answer still gets a lot of traffic. Since...
UIImage: Resize, then Crop
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I needed the same thing - in my case, to pick the dimension that fits once scaled, and then crop each end to fit the rest to the width. (I'm working in landscape, so might not have noticed any deficiencies in portrait mode.) Here's my code...
How to open emacs inside bash
...w this will open emacs inside the terminal disregarding the DISPLAY environment variable even if it is set.
The long form of this flag is emacs --no-window-system.
More information about emacs launch options can be found in the manual.
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TypeScript Objects as Dictionary types as in C#
I have some JavaScript code that uses objects as dictionaries; for example a 'person' object will hold a some personal details keyed off the email address.
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Convert tabs to spaces in Notepad++
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I just want to add that the path for me was: Settings => Language Menu/Tab Settings => Replace by space (In the bottom right corner). It is almost as mrzli said, but I had a hard time noticing where it said Tab Settings. (I know I am blind!)
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How can I count all the lines of code in a directory recursively?
...er a specific directory and its subdirectories. We don't need to ignore comments, as we're just trying to get a rough idea.
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UINavigationBar custom back button without title
...o that the back button displays back instead of the root view controller name
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
Swift 2
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style...
Java default constructor
What exactly is a default constructor — can you tell me which one of the following is a default constructor and what differentiates it from any other constructor?
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Concatenating Files And Insert New Line In Between Files
...the done you can overwrite instead of append, which will remove the requirement to make sure the file is missing or empty before the loop.
– tripleee
Feb 16 '16 at 4:59
add a ...
Creating the Singleton design pattern in PHP5
... Singleton class
*
*/
final class UserFactory
{
/**
* Call this method to get singleton
*
* @return UserFactory
*/
public static function Instance()
{
static $inst = null;
if ($inst === null) {
$inst = new UserFactory();
}
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