Groovy Category Annotation
Annotations really provides a whole new view of programming things. Groovy also provides some of its own annotations one of them is Category. Lets take an example of using it. We create a IntegerUtil class and annotate it with Category.
@Category(Integer)
class IntegerUtil {
List<Integer> multiples(Integer upto) {
(1..upto).collect {this * it}
}
}
Now the above code made your class any other groovy category class for example Time Category. Now you can use these methods as follows -:
List<Integer> multiples
use(IntegerUtil) {
multiples = 2.multiples(10)
}
println multiples // Output -: [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
It really helps when you want some more helper methods on already existing classes.
Hope it helps
Uday Pratap Singh
uday@intelligrape.com
DavidYou may want to look at the other job trends posts, in the Job Trends cogetary. Learning scripting languages is a good idea, but moving completely away from Java may not be a good thing. Do some research on your general area or type of development to determine which language may have the best job prospects. Thanks for reading!