Type:
Class
SDBM provides a simple file-based key-value store, which can only store String keys and values.
Note that Ruby comes with the source code for SDBM, while the DBM and GDBM standard libraries rely on external libraries and headers.
Examples
Insert values:
require 'sdbm' SDBM.open 'my_database' do |db| db['apple'] = 'fruit' db['pear'] = 'fruit' db['carrot'] = 'vegetable' db['tomato'] = 'vegetable' end
Bulk update:
require 'sdbm'
SDBM.open 'my_database' do |db|
db.update('peach' => 'fruit', 'tomato' => 'fruit')
end
Retrieve values:
require 'sdbm'
SDBM.open 'my_database' do |db|
db.each do |key, value|
puts "Key: #{key}, Value: #{value}"
end
end
Outputs:
Key: apple, Value: fruit Key: pear, Value: fruit Key: carrot, Value: vegetable Key: peach, Value: fruit Key: tomato, Value: fruit