class Fixnum
Public Instance Methods
closest_fibonacci()
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return closest fibonacci number which is <= self E.g. 256.closest_fibonacci => 233
# File lib/fib.rb, line 4 def closest_fibonacci if self < 0 return nil elsif self <= 3 return self end fib_n_2,fib_n_1,fib = 1,2,3 while self >= fib fib = fib_n_1 + fib_n_2 fib_n_2, fib_n_1 = fib_n_1, fib end fib_n_2 end