On Dec 27, 6:56 pm, Jeremy McAnally <jeremymcana... / gmail.com> wrote:
> I believe you can use `help`.  For example:  help puts
>

First of all, thanks for your response.
Yes, I did try things like 'help puts', but all I get are these error
messages:
-------------------------------------------
irb(main):032:0> help puts

No ri documentation found in:

Was rdoc run to create documentation?

Errno::ENOENT: No such file or directory - (null)
	from /usr/lib/ruby/1.8/rdoc/usage.rb:100:in `initialize'
	from /usr/lib/ruby/1.8/rdoc/usage.rb:100:in `open'
	from /usr/lib/ruby/1.8/rdoc/usage.rb:100:in `usage_no_exit'
	from /usr/lib/ruby/1.8/rdoc/usage.rb:93:in `usage'
	from /usr/lib/ruby/1.8/rdoc/ri/ri_driver.rb:39:in
`report_missing_documentation'
	from /usr/lib/ruby/1.8/rdoc/ri/ri_driver.rb:25:in `initialize'
	from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_require'
	from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in `require'
	from (eval):3:in `help'
	from (irb):32
	from (null):0
irb(main):033:0>
-------------------------------------

I use Ubuntu 7.10, and I have already installed rdoc. I don't
understand
the error message much but it seems I have to do something else to
make the help command work. Do I have to install ruby source and run
rdoc through them?

Regards,
Santanu