Ruby on rails ruby中使用多数组值的哈希

如何尝试为以下输入构建哈希

[["Company", "Add"], ["Company", "Edit"], ["Company", "Delete"], ["Company", "List"], ["Caterer", "Add"], ["Caterer", "Edit"], ["User", "Add"]] 

输出应该是

[{'Company'=>['Add', 'List', 'Edit', 'Delete']},
 {'Caterer'=>['Add', 'List', 'Edit', 'Delete']},
 {'User'=>['Add']}]

尝试1：

input = [["Company", "Add"], ["Company", "Edit"], ["Company", "Delete"], ["Company", "List"], ["Caterer", "Add"], ["Caterer", "Edit"], ["User", "Add"]]
a=[]
input.each do |inp|
  tmp = Hash.new
  a<< tmp.update(inp[0] => inp[1])
end

这应该行得通

result={}
[["Company", "Create"], ["Company", "Edit"], ["Company", "Delete"], ["Company", "List"], ["Caterer", "Create"], ["Caterer", "Edit"], ["User", "Add"]].each do  |value|
   result[value[0]]=[] unless result.has_key? value[0]
   result[value[0]] << value[1]
end
puts result.to_s

{"Company"=>["Create", "Edit", "Delete", "List"], "Caterer"=>["Create", "Edit"], "User"=>["Add"]}

编辑：我刚刚看到您需要一个成对数组，而不是散列。您可以通过以下方式实现：

as_hash.map { |pair| Hash[*pair] }

---

你试过什么吗？请分享你的努力，“创造”是怎么回事？是不是因为输入也错误，所以输出不匹配？@检查我的结果，从中可以对键和值进行分组？@FerdinandRosario yep，使用

group_by{x | x.keys.first}

餐饮服务商

键是错误的，就像

公司

一样<代码>{“Company”=>[“Create”、“Edit”、“Delete”、“List”]，“Caterer”=>[“Create”、“Edit”]，“User”=>[“Add”]}如下所示，输出与OP不同，也是创建一个

hash

，但OP需要一个hashesanyway数组，

{“Company”=>[“Add”、“List”、“Edit”、“Delete”]，“Caterer”=>[“Add”、“Edit”]，“User”=>“Add”}”}

这与我们想要的不一样

Caterer

是错误的。它还创建了一个散列，但OP需要一个散列数组。@。再次感谢！

r=result.map{|k,v| {k=>v} }

input = [["Company", "Add"], ["Company", "Edit"], ["Company", "Delete"], ["Company", "List"], ["Caterer", "Add"], ["Caterer", "Edit"], ["User", "Add"]]

as_hash = input.group_by(&:first)
as_hash.each do |entity, actions|
  as_hash[entity] = actions.flatten.reject do |action|
    action == entity
  end.sort_by { |action| ['Add', 'List', 'Edit', 'Delete'].index action }
end

as_hash.map { |pair| Hash[*pair] }