77 lines
1.4 KiB
Plaintext
77 lines
1.4 KiB
Plaintext
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# << Usage >>
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# you can feed this README to irb and see the result
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# $ irb README
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# IMPORTANT NOTICE:
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# be careful with big *fixnum* (plain int) values in configs
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# int is 32 bit, but ruby fixnum is only 31!
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# For example, 2100000000 will be read as -47483648.
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require 'rconfig'
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c = Config.new
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c.read!('test.cfg')
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# => IOError
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c.read('test.cfg')
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# => false
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p c['some_var']
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# => SettingNotFoundError
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# note: Config#lookup is alias for Config#[]
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c.append 'fixnum', Config::Fixnum.new(150)
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# #<Config::Fixnum...>
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f1 = Config::Fixnum.new(1)
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c.append 'another_fixnum', f1
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f2 = Config::Fixnum.new(256)
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c.append 'next_fixnum', f2
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p c.size
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# => 3
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c.delete(f1) # by element
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c.delete(0) # by index
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c.delete('next_fixnum') # by name
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# note: (at now) you cannot delete nested elements by Config#delete
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# you can do c['nested.element'].parent.delete(c['nested.element'])
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p c.size
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# => 0
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l = Config::List.new
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c.append 'the_list', l
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l.append Config::String.new("abcdef")
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l << Config::Float.new(3.14)
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# note: Config::List#append and Config::Array#append both have
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# aliases Config::[Aggregate]#<<
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p l.name
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# => "the_list"
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p l.index
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# => 0
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p l.root?
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# => false
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p l.size
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# => 3
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l[0].format = Config::FORMAT_HEX
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p l[1].value
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# => 3.14
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l[1].value = 2.71828
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c.write 'test.cfg'
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# you will get test.cfg with following contents:
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#
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# the_list = ( "abcdef", 2.71828, 0x2A );
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#
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