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?
Thanks,
Stuart
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