对数组进行排序并使其在多个条件下是唯一的- Ruby

arr = [
  { name: 'John', age: 25, score: 80 },
  { name: 'Alice', age: 30, score: 90 },
  { name: 'Bob', age: 20, score: 70 },
  { name: 'Alice', age: 25, score: 85 }
]

arr.sort! do |a, b|
  # 按照name升序排序
  result = a[:name] <=> b[:name]
  
  # 如果name相同，则按照age升序排序
  result = a[:age] <=> b[:age] if result == 0
  
  # 如果name和age都相同，则按照score降序排序
  result = b[:score] <=> a[:score] if result == 0
  
  result
end

puts arr.inspect

[
  {:name=>"Alice", :age=>25, :score=>85},
  {:name=>"Alice", :age=>30, :score=>90},
  {:name=>"Bob", :age=>20, :score=>70},
  {:name=>"John", :age=>25, :score=>80}
]