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irb ÊÇ´ÓÃüÁîÐÐÔËÐеÄ
irb µÄÃüÁîÐÐÑ¡Ïժ×Ô¡¡Porgramming Ruby µÚ¶þ°æ£©
-f
½ûÖ¹¶ÁÈ¡~/.irbrc¡¡Suppress reading ~/.irbrc.
-m
Êýѧģʽ£¨Ö§³Ö·ÖÊýºÍ¾ØÕ󣩡¡Math mode (fraction and matrix support is available).
-d
ÉèÖÃ#DEBUGΪtrue(ͬruby -dÒ»Ñù)¡¡¡¡Set $DEBUG to true (same as ``ruby -d'').
-r load-module
ͬruby -r¡¡Same as ``ruby -r''.
--inspect
ʹÓÃObject#inspectÀ´¸ñʽ»¯Êä³ö£¨Ä¬ÈÏ·½Ê½£¬³ýÊýѧģʽÍ⣩¡¡Use ``inspect'' for output (the default, unless in math mode).
 
--noinspect
²»Ê¹ÓÃinspect½øÐÐÊä³ö¡¡Do not use inspect for output.
--readline
ʹÓÃReadlineÀ©Õ¹Ä£¿é¡¡Use Readline extension module.
--noreadline
²»Ê¹ÓÃReadlineÀ©Õ¹Ä£¿é¡¡Do not use Readline extension module.
--prompt prompt-mode
Çл»Ìáʾ·û¡£Ô¤¶¨ÒåµÄģʽ°üÀ¨£¨null,default,simple,xmpÒÔ¼°inf-ruby£©¡¡Switch prompt mode. Predefined prompt modes are ``default'', ``simple'', ``xmp'', and ``inf-ruby''.
--prompt-mode prompt-mode
Same as --prompt.
 
--inf-ruby-mode
ÉèÖÃirbÒÔEmacsµÄinf-ruby-modeģʽÔËÐУ¬¸ü¸ÄÌáʾ·û²¢·ÏÖ¹-readline¡¡Sets up irb to run in inf-ruby-mode under Emacs. Changes the prompt and suppresses --readline.
 
--simple-prompt
ʹÓüòµ¥µÄÌáʾ·û¡¡Simple prompt mode.
--noprompt
²»ÏÔʾÌáʾ·û¡¡Do not display a prompt.
--tracer
ÏÔʾÃüÁîÖ´Ðеĸú×Ù¡¡Display trace for execution of commands.
--back-trace-limit n
ÏÔʾ×î¶¥²¿ºÍβ²¿µÄnÏî»ØËÝÐÅÏ¢¡£Ä¬ÈÏֵΪ16¡¡Display backtrace information using the top n and last n entries. The default value is 16.
 
--irb_debug n
½«ÄÚ²¿µ÷ÊÔ¼¶±ðÉèÖÃΪn(Ö»¶ÔirbµÄ¿ª·¢ÓÐÓã©¡¡Set internal debug level to n (only for irb development).
 
-v, --version
ÏÔʾirbµÄ°æ±¾ºÅ¡¡Print the version of irb.
ÃüÁîÐпªÊ¼Ö´Ðкó£¬irbÏÔʾһ¸öÌáʾ·û²¢µÈ´ýÊäÈë¡£
ʹÓÃirbµÄĬÈÏÌáʾ·û£¬ËüÏÔʾµ±Ç°µÄ°ó¶¨¡¢Ëõ½ø£¨Ç¶Ì×£©¼¶±ðÒÔ¼°Ðкš£
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C:\>irb
irb(main):001:0> elvuel="elvuel"
=> "elvuel"
irb(main):002:0> elvuel.class
=> String
 
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require 'win32ole'
excel = WIN32OLE::new('excel.Application')
workbook = excel.Workbooks.Open('E:\RubyApp\bmk.xls')
worksheet = workbook.Worksheets(1) #get hold of the first worksheet
worksheet.Select #bring it to the front -need sometimes to run macros, not for working with a worksheet from ru ......

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class Person
 
  def initialize( name,age=18 )
    @name = name
    @age = age
    @motherland = "China"
  end
 
  def talk
    puts "my name is "+@name+", age is "+@age.to_s
 &n ......
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