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  1. f = -> a {a.each_cons(2).map {|b, c| c - b}}
  2. p f.([3, 1, 4, 1, 5, 9, 2, 6, 5])
  3.  
Success #stdin #stdout 0.01s 6436KB
comments (?)
stdin 
Standard input is empty
stdout 
[-2, 3, -3, 4, 4, -7, 4, -1]
https://ideone.com/KZ9YO3
language:
Ruby (ruby 2.5.5)
created:
4 years ago
visibility:
secret

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