Question

我在表单中提交了一系列哈希值。我正在等待一个开头的唯一键，因为字段的名称是相同的，我需要阻止它们互相覆盖。但是当我在一个字段中保存序列化的数据时，我不再需要密钥了，所以我正在寻找最好的方法来解决它：

{"6"=>{"Between Wires"=>"0"},
 "7"=>{"Wires to GND"=>"0"},
 "8"=>{"Between Wires"=>"0"},
 "9"=>{"Wires to GND"=>"0"},
 "10"=>{"Between Wires"=>"0"},
 "11"=>{"Wires to GND"=>"0"},
 "13"=>{"Between Wires"=>"0"},
 "14"=>{"Wires to GND"=>"0"},
 "16"=>{"Between Wires"=>"0"},
 "17"=>{"Wires to GND"=>"0"},
 "19"=>{"Between Wires"=>"0"}}

如何删除密钥以便我拥有它？

{{"Between Wires"=>"0"},
 {"Wires to GND"=>"0"},
 {"Between Wires"=>"0"},
 {"Wires to GND"=>"0"},
 {"Between Wires"=>"0"},
 {"Wires to GND"=>"0"},
 {"Between Wires"=>"0"},
 {"Wires to GND"=>"0"},
 {"Between Wires"=>"0"},
 {"Wires to GND"=>"0"},
 {"Between Wires"=>"0"},
 {"Wires to GND"=>"0"}}

Answer 1

已经回答了，但我相信更好的解决方案是使用#values

hash = {
 "6"=>{"Between Wires"=>"0"},
 "7"=>{"Wires to GND"=>"0"},
 "8"=>{"Between Wires"=>"0"}
}

hash.values

Answer 2

您可以使用map对其进行迭代，然后省略密钥。

old = {"6"=>{"Between Wires"=>"0"}, "7"=>{"Wires to GND"=>"0"}}
new = old.map { |k,v| v }

Rails - 从哈希数组中删除键

2 个答案: