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Convert Array to Hash

Probably nothing new in this but here is one way of converting an Array to a Hash:

require "enumerator"

class Array
  def to_h
    Hash[*enum_with_index.to_a.flatten]
  end
end

%w{a b c d}.to_h  # =>  {"a"=>0, "b"=>1, "c"=>2, "d"=>3}


to ruby hash convert array to_h by pervel on Dec 22, 2006
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