ComplexCondition as described in [Andres Valloud, "A Mentoring Course on Smalltalk"](http://www.lulu.com/product/paperback/a-mentoring-course-on-smalltalk/3788890) is available at http://www.squeaksource.com/ComplexCondition.html
With it, you can do something like:
```
^[a includes: $.], [b includes: $.]
ifAllTrue: [a < b]
ifAnyTrue: [b includes: $.]
otherwise: [a > b]
```
