On Jan 21, 8:43 pm, Stuart Halloway <stuart.hallo...@gmail.com> wrote:
> Consider the function deeply-nested:
>
> (defn deeply-nested [n]
> (loop [n n
> result [:bottom]]
> (if (= n 0)
> result
> (recur (dec n) [result]))))
>
> If you print it at the REPL for small values of n, no problem:
>
> (deeply-nested 25)
> -> [[[[[[[[[[[[[[[[[[[[[[[[[[:bottom]]]]]]]]]]]]]]]]]]]]]]]]]]
>
> But for large values of n:
>
> (deeply-nested 1000000)
> -> java.lang.StackOverflowError
>
> You can dodge this problem by setting *print-level*
>
> (set! *print-level* 25)
> -> 25
> (deeply-nested 1000000)
> -> [[[[[[[[[[[[[[[[[[[[[[[[[#]]]]]]]]]]]]]]]]]]]]]]]]]
>
> But what if you really want to print a deeply nested structure? What
> is the simplest modification to core_print.clj that gets the job done?
> Is this a good use case for trampoline, or is there a better Clojurish
> way?
Is this a real problem or a theoretical one?
Rich
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