工作與嵌套數組哈希紅寶石

Question

我有一個很難與嵌套哈希

Restaurant = {:name=>"McDonalds", 
:location=>"NYC", 
:chefs=> 
    [{:name=>"Sunny", :food=>"fries"}, 
    {:name=>"Brooklyn", :food=>"burgers"}, 
    {:name=>"Mac", :food=>"burgers"}], 
:waiters=> 
    [{:name=>"Jess", :role=>"senior manager"}, 
    {:name=>"Sam", :role=>"manager"}, 
    {:name=>"Jack", :role=>"server"}, 
    {:name=>"Mary", :role=>"server"}]} 

我怎麼會跟傑克刪除服務員哈希，例如值？ 或者返回服務器角色的所有服務員的名字？

Answer 1

Restaurant[:waiters].reject!{|h| h[:name] == "Jack"} 
Restaurant # => { 
    :name=>"McDonalds", :location=>"NYC", 
    :chefs=>[{:name=>"Sunny", :food=>"fries"}, {:name=>"Brooklyn", :food=>"burgers"}, {:name=>"Mac", :food=>"burgers"}], 
    :waiters=>[{:name=>"Jess", :role=>"senior manager"}, {:name=>"Sam", :role=>"manager"}, {:name=>"Mary", :role=>"server"}] 
} 

Restaurant[:waiters].select{|h| h[:role] == "server"} 
# => [{:name=>"Mary", :role=>"server"}]