convert array to a hash : Array Extension « Array « Ruby






  1. Ruby
  2. Array
  3. Array Extension

convert array to a hash


class Array

  def invert
    h={}
    self.each_with_index{|x,i| h[x]=i}
    h
  end

end

a = ["red","yellow","orange"]
h = a.invert     # {"orange"=>2, "yellow"=>1, "red"=>0}








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