带散列的数组 - 如何舍入（2）值

Question

我多年来一直在努力。我正在尝试使用哈希值对数组进行舍入。

[
  {
    :email => "user_01@yorlook.com",
    :amount => 129.22500000000002
  },
  {
    :email => "user_02@yorlook.com",
    :amount => 112.67500000000001
  }
]

我需要一种方法让它看起来像这样：

[
  {
    :email => "user_01@yorlook.com",
    :amount => 129.23
  },
  {
    :email => "user_02@yorlook.com",
    :amount => 112.68
  }
]

提前感谢您的帮助！

Answer 1

假设arr始终包含Hash，密钥amount为Float（如示例所示）。

arr.each { |hash|
 hash[:amount] = hash[:amount].round(2)
}
#=> [{:email=>"user_01@yorlook.com", :amount=>129.23}, {:email=>"user_02@yorlook.com", :amount=>112.68}]