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http://www.blogjava.net/xxllnnn/archive/2009/01/18/251762.html
http://www.cnblogs.com/cnblogsfans/archive/2009/01/24/1380804.html
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    alias new_method_name old_method_name
    alias_method :new_method_name, :old_method_name
    alias_method 'new_method_name', 'old_method_name'
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def is_name_used(name)
str=open('http://passport.csdn.net/UserExist.aspx?UserName='+name)
str=str.read
#str=str.encode('GBK','utf-8')
return true if str[/Red/]
end
def enum_names(len=2)
return if len<2
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=> "show trs ......
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