/examples/beautiful_code/quicksort_runtime.coffee

http://github.com/jashkenas/coffee-script · CoffeeScript · 13 lines · 9 code · 2 blank · 2 comment · 1 complexity · c5134dd26f5296bbfd80f9a7aa6fbacb MD5 · raw file 

    

  1. # Beautiful Code, Chapter 3.
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  2. # Produces the expected runtime of Quicksort, for every integer from 1 to N.
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  3. 

  4. runtime = (N) ->
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  5.   [sum, t] = [0, 0]
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  6.   for n in [1..N]
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  7.     sum += 2 * t
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  8.     t = n - 1 + sum / n
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  9.   t
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  10. 

  11. console.log runtime(3) is 2.6666666666666665
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  12. console.log runtime(5) is 7.4
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  13. console.log runtime(8) is 16.92142857142857
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