Predicate factory classes for Comparable types #429
Comments
|
Original comment posted by boppenheim@google.com on 2010-09-23 at 04:16 AM This seems reasonable to me. Much more low priority, but if we add these methods, I wonder if it's worth having corresponding methods that take a reference and a Comparator. Seems like it may be useful for working with library code that you can't modify. |
|
Original comment posted by SeanPFloyd on 2010-09-23 at 04:50 PM I agree, I was going to suggest the same thing. |
|
Original comment posted by kevinb@google.com on 2010-12-17 at 06:31 AM The way we'll address the main (Comparable) case is that our Range class will implement Predicate. Ranges will support the four kinds of single-ended Ranges you list above, as well as the four kinds of double-ended Ranges and the "everything" range! |
|
Original comment posted by SeanPFloyd on 2010-12-17 at 08:33 AM nice, thanks for the info! |
|
Original comment posted by kevinb@google.com on 2011-01-27 at 06:17 AM (No comment entered for this change.) Status: |
Original issue created by SeanPFloyd on 2010-09-21 at 03:33 PM
I would like to see the following factory methods in Predicates:
Predicate<T> largerThan(T reference)
Predicate<T> largerThanOrEqual(T reference)
Predicate<T> smallerThan(T reference)
Predicate<T> smallerThanOrEqual(T reference)
where <T extends Comparable<T>> and all methods use compareTo() internally
sample usage:
Collections2.filter(Arrays.asList(1,2,3,4), Predicates.largerThan(2))
=> [3, 4]
Patch with sample code is attached.
The text was updated successfully, but these errors were encountered: