Ruby vars as an array element name?

gistfile1.rb

# data_bag JSON:

{
  "id": "example_data_bag_id",
  "example_account": {
    "private_value": "Example Private Data",
    "public_value": "Example Public Data"
  }
}

# Recipe:

# node['example_cookbook']['databagname'] = 'example_account' 
databagid = node['example_cookbook']['databagname']
# At this point, #{databagid} should = "example_account"
chefkey = Chef::EncryptedDataBagItem.load_secret(node['example_cookbook']['secretpath'])
databagarray = Chef::EncryptedDataBagItem.load(databagid, 'example_data_bag_id', chefkey)
# Should be like passing ('example_account', 'example_data_bag_id', chefkey)
privatevalue = databagarray["#{databagid}"]['private_value']
publicvalue = databagarray["#{databagid}"]['public_value']
# Is it possible to use a Ruby var as an array element name in this way?

data_bag JSON:

Databag name: example_data_bag

{
"id": "example_data_bag_item",
"example_account": {
"private_value": "Example Private Data",
"public_value": "Example Public Data"
}
}

Recipe:

chefkey = Chef::EncryptedDataBagItem.load_secret(node['example_cookbook']['secretpath'])
databagarray = Chef::EncryptedDataBagItem.load('example_data_bag', 'example_data_bag_item', chefkey)
privatevalue = databagarray["example_account"]['private_value']
publicvalue = databagarray["example_account"]['public_value']