rwwilden (8) [Avatar] Offline
#1
There's supposed to be some additional example code here: http://www.functional-programming.net/links.aspx. But since it's not available yet, I have a question concerning a suggestion from paragraph 7.4.2, p.199, the filterDocument function.

How do you write such a function? What happens when you match an element for which the filter function returns true? You can't return nothing.