Ruby/删除匹配的键/哈希数组后的所有内容

Question

假设我有以下哈希数组:

h = [{"name" => "bob"}, {"car" => "toyota"}, {"age" => "25"}]

我有以下匹配键:

k = 'car'

如何将 'k' 匹配到 'h' 并在匹配后删除每个元素以使其返回:

h = [{"name" => "bob"}, {"car" => "toyota"}]

Answer 1

只需将散列转换为数组，完成您的任务，然后再转换回来

h = {"name" => "bob", "car" => "toyota", "age" => "25"}

array = h.to_a.flatten
index = array.index('car') + 1

h = Hash[*array[0..index]]
=> {"name"=>"bob", "car"=>"toyota"}

顺便说一句，从 Ruby 1.9 开始哈希才被排序