working with nested arrays hashes ruby

Question

I'm having a hard time with nested hashes

 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"}]}

how would I delete the waiter hash with Jack as a value for example? or return all waiter's names with the role of server?

sawa · Accepted Answer · 2013-07-26 04:10:20Z

2

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"}]

answered Jul 26, 2013 at 4:10

sawa

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7 Comments

7stud Over a year ago

I think you posted the output of another version of your code. There is more than one waiter that has the role = "server".

sawa Over a year ago

@7stud It is continuous. After "Jack" has been deleted, there is only "Mary".

sawa Over a year ago

Restaurant[:waiters].find{|h| h[:name] == "Jack"}[:role] = "manager"

user2621221 Over a year ago

Thanks! Also, how do you print out all the elements in the array since you can't just simply puts it.

sawa Over a year ago

Have you considered of accepting an answer before keep adding new questions?

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