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Enum ToString with user friendly strings
...
I created a reverse extension method to convert the description back into an enum value:
public static T ToEnumValue<T>(this string enumerationDescription) where T : struct
{
var type = typeof(T);
if (!type.IsEnum)
throw new ArgumentExceptio...
Ruby optional parameters
...ameters:
array = [1, 2, 97, 98, 99]
p array.ascii_to_text([32, 126, 1]) # Convert all ASCII values of 32-126 to their chr value otherwise keep it the same (That's what the optional 1 is for)
output: ["1", "2", "a", "b", "c"]
Okay, cool that works as planned. Now let's check and see what happens ...
Runtime vs. Compile time
What is the difference between run-time and compile-time?
28 Answers
28
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How to pass parameters to anonymous class?
...se are executed in the same order as field assignments, i.e. after super() and before the rest of the actual constructor. new someclass(){ fields; {initializer} fields; methods(){} }. It's sort of like a static initializer but without the static keyword. docs.oracle.com/javase/specs/jls/se7/html/jls...
Square retrofit server mock for testing
...new Retrofit.Builder()
// Using custom Jackson Converter to parse JSON
// Add dependencies:
// com.squareup.retrofit:converter-jackson:2.0.0-beta2
.addConverterFactory(JacksonConverterFactory.crea...
Is there a method that calculates a factorial in Java?
...ommon example program for beginners. But wouldn't it be useful to have a standard implementation for this one to reuse?
I could use such a method with standard types (Eg. int, long...) and with BigInteger / BigDecimal, too.
...
Easy way to concatenate two byte arrays
...u simply add the line outputStream.write( c ); - you don't have to go back and edit the line where you create the result byte array. Also, re-ordering the arrays is simple, unlike using the arraycopy method.
– Wayne Uroda
Aug 27 '12 at 11:38
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An algorithm for inflating/deflating (offsetting, buffering) polygons
...ed this jsFiddle that uses JSTS (JavaScript port of JTS). You just need to convert the coordinates you have to JSTS coordinates:
function vectorCoordinates2JTS (polygon) {
var coordinates = [];
for (var i = 0; i < polygon.length; i++) {
coordinates.push(new jsts.geom.Coordinate(polygon[i...
Consistency of hashCode() on a Java string
...because the algorithm has been specified... so long as you're willing to abandon compatibility with releases before the algorithm was specified, of course.
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How to get milliseconds from LocalDateTime in Java 8
...eady have a LocalDateTime or similar object from somewhere and you want to convert it to milliseconds since the epoch. It's not possible to do that directly, since the LocalDateTime family of objects has no notion of what time zone they're in. Thus time zone information needs to be supplied to find ...