nondeterministic behavior

gistfile1.rb

s1 = [
  {
    "attributes" => {
      "role"=>"grad-research-assistant",
    },
    "from" => "47baa997c443e40ae6519aae096d9e72",
    "relationship_type" => "project_role"
  },
  {
    "attributes" => {
      "role" => "other - Student",
    },
    "from" => "179eae3982ab1e4047051381fbe0f137",
    "relationship_type" => "project_role"
  }
]


class Hash
  def <=>(other)
    result = ([ self.keys, self.values ] <=> [ other.keys, other.values ])
    return result
  end
end

def sort_relationships!(relationships)
  relationships.sort! { |rel1, rel2|
    [ rel1['relationship_type'], rel1.keys, rel1.values ] <=> [ rel2['relationship_type'], rel2.keys, rel2.values ]
  }
end

sort_relationships!(s1)

# p s1
puts s1[0]['attributes']['role']
puts s1[1]['attributes']['role']