+c.read('test.cfg')

+# => false

+

+p c['some_var']

+# => SettingNotFoundError

+# note: Config#lookup is alias for Config#[]

+

+c.append 'fixnum', Config::Fixnum.new(150)

+# #<Config::Fixnum...>

+

+f1 = Config::Fixnum.new(1)

+c.append 'another_fixnum', f1

+

+f2 = Config::Fixnum.new(256)

+c.append 'next_fixnum', f2

+

+p c.size

+# => 3

+

+c.delete(f1) # by element

+c.delete(0) # by index

+c.delete('next_fixnum') # by name

+# note: (at now) you cannot delete nested elements by Config#delete

+# you can do c['nested.element'].parent.delete(c['nested.element'])

+

+p c.size

+# => 0

+

+l = Config::List.new

+c.append 'the_list', l

+

+l.append Config::String.new("abcdef")

+l << Config::Float.new(3.14)

+# note: Config::List#append and Config::Array#append both have

+# aliases Config::[Aggregate]#<<

+

+p l.name

+# => "the_list"

+

+p l.index

+# => 0

+

+p l.root?

+# => false

+

+p l.size

+# => 3

+

+l[0].format = Config::FORMAT_HEX

+

+p l[1].value

+# => 3.14

+

+l[1].value = 2.71828

+

+c.write 'test.cfg'

+

+# you will get test.cfg with following contents:

+#

+# the_list = ( "abcdef", 2.71828, 0x2A );

+#