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A comment on Not Lisp again (2009). Parent comment

Re:Not Lisp again (2009) by 8nd9rfi on Friday October 26, 2018 @10:30PM (#18314052)
Same in Haskell:

   *Main> derivative f x = (f(x+dx)-f(x))/dx where dx = 0.0001
   *Main> derivative (^3) 2
   12.000600010022566
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