Hi clojure folk, I'm reading up on clojure from the book 'Programming clojure'. In chapter 2 there is a statement -
"The imperative indexOfAny must deal with several special cases: null or empty strings, a null or empty set of search characters, and the absence of a match. These special cases add branches and exits to the method. With a functional approach, most of these kinds of special cases just work without any explicit code." I'm not quite sure if I understand this properly. How is it that with a functional approach, most of these special cases like null checks or empty checks get handled automatically? I mean isn't that a property of the language / api rather than the programming approach per se? Please explain with some examples! On a similar note, following is the definition of the function index- filter given in the book :- (defn index-filter [pred coll] (when pred (for [[idx elt] (indexed coll) :when (pred elt)] idx))) Why is the 'when pred' check necessary? Thanks! -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en