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What is the purpose of the reader monad?
...r passing (implicit) configuration information through a computation.
Any time you have a "constant" in a computation that you need at various points, but really you would like to be able to perform the same computation with different values, then you should use a reader monad.
Reader monads are a...
How to find difference between two Joda-Time DateTimes in minutes
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This will get you the difference between two DateTime objects in milliseconds:
DateTime d1 = new DateTime();
DateTime d2 = new DateTime();
long diffInMillis = d2.getMillis() - d1.getMillis();
sha...
How do I find the install time and date of Windows?
...on, but how can I find out (hopefully via an API/registry key) the install time and date of Windows?
19 Answers
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Objective-C: Reading a file line by line
...);
This code reads non-newline characters from the file, up to 4095 at a time. If you have a line that is longer than 4095 characters, it keeps reading until it hits a newline or end-of-file.
Note: I have not tested this code. Please test it before using it.
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Sorting a vector of custom objects
...ng the ordering logic which might be a severe drawback (at least when link time optimization/code generation is not applied).
Ways to achieve comparability of class X in order to use standard library sorting algorithms
Let std::vector<X> vec_X; and std::vector<Y> vec_Y;
1. Overload T:...
How are the points in CSS specificity calculated
...but it's not base 10. It's base 256. Here's how it works:
(28)2 or 65536, times the number of ids in the selector
+ (28)1 or 256, times the number of class-names in the selector
+ (28)0 or 1, times the number of tag-names in the selector
This isn't very practical for back-of-the-envelop exercises...
How to convert Strings to and from UTF8 byte arrays in Java
...harset class. The JDK documentation lists supported encodings.
90% of the time, such conversions are performed on streams, so you'd use the Reader/Writer classes. You would not incrementally decode using the String methods on arbitrary byte streams - you would leave yourself open to bugs involving ...
How do I write a custom init for a UIView subclass in Swift?
...In this case, you would initialize them in awakeFromNib() or at some later time.
class TestView : UIView {
var s: String?
var i: Int?
init(s: String, i: Int) {
self.s = s
self.i = i
super.init(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
}
require...
Using jQuery to test if an input has focus
...t ourselves. Just use $("..").is(":focus")
jQuery 1.5 and below
Edit: As times change, we find better methods for testing focus, the new favorite is this gist from Ben Alman:
jQuery.expr[':'].focus = function( elem ) {
return elem === document.activeElement && ( elem.type || elem.href )...
How to pass JVM options from bootRun
...
Doing this with gradle required that the system property provided at the time of running gradle build, shown here,
gradle build -Ddeep.test.run=true
was indeed passed through to the tests.
Hope this helps others trying out this approach for running tests conditionally.
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