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AboutAll PostsWarningRandom

Multiplicative Persistence

  1. const multp = (val, count = 1, res) => 
  2.   (res = (val + '').split``
  3.     .reduce((a, b) => a * b, 1) + '').length > 1 ?
  4.       multp(res, count + 1) : count
  5.  
  6.  
  7. console.log('test:', multp(2678789))

Started watching this youtube video from numberphile and instantly made this half-golfed thing

Found this:

f=n=>[n,...n>9?f(eval([...n+''].join`*`)):[]]

By Arnauld over at codegolf.stackexchange

will definitely remember: [...n+'']

// golfed // hacks // humor // javascript // math

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