Create array from range

[Greg Strong via Digitalmars-d-learn]

This should be a simple question, but I'm having difficult 
finding an answer.  How do I filter some elements of an array 
into a new array?  The filter! function returns a range, but I 
can't seems to assign it to a new array.  I get:

Cannot implicitly convert expression of type 
FilterResult!(__lambda10 ...

Nothing I try to construct a new array seems to work.