Hi All,
I'm watching Brian Harvey's SICP lecture #3 from Berkeley 61A/Spring
2011 and had a question about how I could refactor the following
function so that the (+a 1) can be abstracted to be a function and
passed in.
Here is the original:
(defn square [x] (* x x))
(defn sum [fn a b]
(if (> a b)
0
(+ (fn a) (sum fn (+ a 1) b))))
=> (sum square 2 4)
29
That works. So then I want to replace (+ a 1) with a function like:
(defn addone [a] (inc a))
but I'm not sure how this would be structured.
I'm new to clojure and realize this is a stepping stone to learning
about higher order functions so apologies in advance for any code
ugliness due to my newness to clojure.
Thanks for your help!!!
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