%q中定义的字符串，不加分号 如'hello'与%q(hello) 表示同一字符串
%w表示数组，不对变量进行替换;%W表示数组，对变量进行替换
散列表用=>序列进行分隔
irb(main):001:0> %w(fred wilma barney betty great\ gazoo)
=> ["fred", "wilma", "barney", "betty", "great gazoo"]
irb(main):002:0> arr=%w(fred wilma barney betty great\ gazoo)
=> ["fred", "wilma", "barney", "betty", "great gazoo"]
irb(main):003:0> 'hello'
=> "hello"
irb(main):004:0> "hello"
=> "hello"
irb(main):005:0> %q(hello)
=> "hello"
irb(main):006:0> %w(Hey! #{Time.now})
=> ["Hey!", "\#{Time.now}"]
irb(main):007:0> %W(Hey! #{Time.now})
=> ["Hey!", "Sun Mar 25 20:51:48 +0800 2012"]
irb(main):012:0> colors={ "red" => 0xf00,
irb(main):013:1* "green" => 0x0f0,
irb(main):014:1* "blue" => 0x00f
irb(main):015:1> }
=> {"blue"=>15, "green"=>240, "red"=>3840}
