Parse nested JSON with JSON

NestedJSON.rb

require 'rubygems'
require 'json'

json_str = '[
{"title":"GRE Connect","subject":"GRE","type":["bookmark"]},
{"title":"GRE Connect","desc":"another book","type":["bookmark","bookmark_type","reading"]}
]'

arr = JSON.parse(json_str)
p arr
puts

target_hash = arr[1]
target_hash.each do |key, val|
  if key == 't'
    val.each {|elmt| puts elmt}
  end
end