Class: Fixnum

Inherits:
Object
  • Object
show all
Defined in:
lib/rstat/core_ext/fixnum/binomial_coefficient.rb

Instance Method Summary collapse

Instance Method Details

#binomial_coefficient(bottom) ⇒ Object 



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# File 'lib/rstat/core_ext/fixnum/binomial_coefficient.rb', line 2

def binomial_coefficient(bottom)
  (self - bottom + 1 .. self).inject(:*) / (2 .. bottom).inject(:*)
end