CODEWITHSUNDEEP
ruby-on-railsrubyhashhash-of-hashes
paul
paul

Reputation: 133

how to create hash within hash

How am I able to create a hash within a hash, with the nested hash having a key to indentify it. Also the elements that I create in the nested hash, how can I have keys for them as well

for example

test = Hash.new()

#create second hash with a name?? test = Hash.new("test1")??
test("test1")[1] = 1???
test("test1")[2] = 2???

#create second hash with a name/key test = Hash.new("test2")???
test("test2")[1] = 1??
test("test2")[2] = 2??

thank you

Upvotes: 13

Views: 43300

Answers (3)

Joel AZEMAR
Joel AZEMAR

Reputation: 2536

my_hash = { :nested_hash => { :first_key => 'Hello' } }

puts my_hash[:nested_hash][:first_key]
$ Hello

or

my_hash = {}  

my_hash.merge!(:nested_hash => {:first_key => 'Hello' })

puts my_hash[:nested_hash][:first_key]
$ Hello

Upvotes: 20

Kudu
Kudu

Reputation: 6888

h1 = {'h2.1' => {'foo' => 'this', 'cool' => 'guy'}, 'h2.2' => {'bar' => '2000'} }
h1['h2.1'] # => {'foo' => 'this', 'cool' => 'guy'}
h1['h2.2'] # => {'bar' => '2000'}
h1['h2.1']['foo'] # => 'this'
h1['h2.1']['cool'] # => 'guy'
h1['h2.2']['bar'] # => '2000'

Upvotes: 6

glortho
glortho

Reputation: 13198

Joel's is what I would do, but could also do this:

test = Hash.new()
test['test1'] = Hash.new()
test['test1']['key'] = 'val'

Upvotes: 20

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