yaml,load_file

http://ithelp.ithome.com.tw/question/10012281

<br />./script/console<br />Loading development environment (Rails 2.1.1)<br />=>> a=[1,2,3]<br />=> [1, 2, 3]<br />>> a.to_yaml<br />=> "--- \n- 1\n- 2\n- 3\n"<br />>> b=a.to_yaml<br />=> "--- \n- 1\n- 2\n- 3\n"<br />>> YAML::load(b)<br />=> [1, 2, 3]<br />>> c=[2,3,4,5]<br />=> [2, 3, 4, 5]<br />>> c - YAML::load(b)<br />=> [4, 5]<br />