Selector that takes scaled values into account?

[mb706]

Something else I am thinking about: we may want operators that put some kind of ordering on individuals, e.g. non-dominated sorting or crowding distance, that can then be combined for things like elite survival, or tournament selection. Do we need another object type here (ordering operator), or are these also selectors that can be chained somehow?

Originally posted by @mb706 in #33 (comment)

[mb706]

This is solved by Filtors, to be merged.