Ruby double hash

Inside the array is user_data, which has the information of multiple users as a hash.

user_data = [ {user: {profile: {name: 'Ken' }}}, 
              {user: {profile: {name: 'Ichiro' }}},
              {user: {profile: {name: 'Yuki' 
 }}},
]

#Output result in terminal
Ken
Ichiro
Yuki

What if you want to use user_data and code in Ruby so that only the names of all users are output?

To get a specific value from a hash

hash[The key of the value you want to get]

You can get it at. If you want to get a specific value from a double hash, you can get it by continuously specifying the key of the value you want to get.

hash[The key of the value you want to get][The key of the value you want to get]

In this case, I want to get the name, so

hash[:user][:profile][:name]

You can get it at.

Also, since the hashes are stored in the array, it is necessary to extract each hash and extract the name in each statement.

Therefore

user_data = [ {user: {profile: {name: 'Ken' }}}, 
              {user: {profile: {name: 'Ichiro' }}},
              {user: {profile: {name: 'Yuki' 
 }}},
]

#The name in

user_data.each do |u|
  puts u[:user][:profile][:name]
end

You can retrieve the name by writing as follows.