如何在Ruby on rails上删除哈希数组中的重复行

hash_array = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 30 },
  { name: 'John', age: 25 },
  { name: 'Bob', age: 35 }
]

unique_array = hash_array.uniq

puts unique_array.inspect

[
  { name: 'John', age: 25 },
  { name: 'Jane', age: 30 },
  { name: 'Bob', age: 35 }
]

unique_array = hash_array.uniq { |h| h[:name] }