Hi clojure-world,
I think maybe this is actually related to the complexities of binding
referenced in the previous thread
(https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!topic/clojure/zBXsrqTN2xs)...
maybe? But it would be amazing if some wise person would help explain...
So for obscure reasons, I found myself trying to use a naive recursive
fibonacci function interactively. So naturally, the first thing my fingers
went to was:
(let [fib (fn [x]
(cond
(< x 2) x
:else (+ (fib (- x 2)) (fib (- x 1)))))]
(fib 5))
which threw an unable to resolve symbol error because it couldn't resolve
the recursive calls to fib inside the let binding.
But swap out the let for a def and it works just fine:
(def fib (fn [x]
(cond
(< x 2) x
:else (+ (fib (- x 2)) (fib (- x 1))))))
(fib 5)
Can someone clarify for me what's going on here? Why can a def binding get
access to its own name in the body of a function, but not a let binding?
thanks!
-Paul
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