Doug Hoyte's book "Let Over Lambda—50 Years of Lisp" devotes its very title 
to the technique of (let...(fn...)).  

On Friday, March 22, 2013 2:59:43 PM UTC-4, jamieorc wrote:
>
> Curious which style is preferred in Clojure and why:
>
> (defn f1 [] 
>   (let [x {:foo 1 :bar 2 :baz 3}] 
>     (keys x))) 
>
> (let [x {:foo 1 :bar 2 :baz 3}] 
>   (defn f2 [] 
>     (keys x)))
>
> Cheers,
>
> Jamie
>

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