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Reshaping data.frame from wide to long format
...o convert my data.frame from a wide table to a long table.
At the moment it looks like this:
9 Answers
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Get a list of resources from classpath directory
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edited Sep 23 at 11:08
Lena Bru
11.6k77 gold badges5151 silver badges102102 bronze badges
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In Java, how do I parse XML as a String instead of a file?
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edited May 23 '17 at 12:18
Community♦
111 silver badge
answered Feb 18 '09 at ...
Detect whether there is an Internet connection available on Android [duplicate]
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The getActiveNetworkInfo() method of ConnectivityManager returns a NetworkInfo instance representing the first connected network interface it can find or null if none of the interfaces are connected. Checking if this method returns null should be enough to tell if an int...
Splitting String with delimiter
I am currently trying to split a string 1128-2 so that I can have two separate values. For example, value1: 1128 and value2: 2, so that I can then use each value separately. I have tried split() but with no success. Is there a specific way Grails handles this, or a better way of doing it?
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Terminating a script in PowerShell
...to terminate a PowerShell (PS1) script when an unrecoverable error occurs within a function. For example:
10 Answers
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UITextField - capture return button event
How can I detect when a user pressed "return" keyboard button while editing UITextField?
I need to do this in order to dismiss keyboard when user pressed the "return" button.
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How to create war files
...se to run that Ant target. Here are examples of each of the steps:
Preconditions
We'll assume that you have your code organized like:
${basedir}/src: Java files, properties, XML config files
${basedir}/web: Your JSP files
${basedir}/web/lib: Any JARs required at runtime
${basedir}/web/META-INF: ...
rails 3 validation on uniqueness on multiple attributes
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In Rails 2, I would have written:
validates_uniqueness_of :zipcode, :scope => :recorded_at
In Rails 3:
validates :zipcode, :uniqueness => {:scope => :recorded_at}
For multiple attributes:
validates :zipcode, :uniqueness => {:scope =&...
Can PHP cURL retrieve response headers AND body in a single request?
....php.net/manual/en/function.curl-exec.php#80442
Code example:
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
// ...
$response = curl_exec($ch);
// Then, after your curl_exec call:
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$header ...