Pluck values from a Ruby array of hashes, like ActiveRecord#pluck

pluck.rb

class Array
  def pluck(*args)
    self.map { |item| args.map { |arg| item[arg] || item[arg.to_sym] || item[arg.to_s]}.flatten }
  end
end

# Example:
# data = [ { "name" => "Cookie Monster", "color" => "blue", "id" => "1" },
#          { "name" => "Kermit the Frog", "color" => "green", "id" => "2" }
#          { "name" => "Big Bird", "color" => "blue", "id" => "3" }
#        ]
#
# data.pluck("id", "name})   # => [ ["1", "Cookie Monster"], ["2", "Kermit the Frog"], ["3", "Big Bird"] ]
#
# It is indifferent to strings or hashes:
#
# data.pluck(:id", :name})   # => [ ["1", "Cookie Monster"], ["2", "Kermit the Frog"], ["3", "Big Bird"] ]
#