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# << Usage >>
# you can feed this README to irb and see the result
# $ irb README
# IMPORTANT NOTICE:
# be careful with big *fixnum* (plain int) values in configs
# int is 32 bit, but ruby fixnum is only 31!
# For example, 2100000000 will be read as -47483648.
require 'rconfig'
c = Config.new
c.read!('test.cfg')
# => IOError
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 );
#
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