From: John Maclean <info@...>
Date: 2006-01-05T06:08:49+09:00
Subject: Re: Recommended command line options for new rubyists

I find it strange that ruby -c foo.rb gives "syntax OK" but ruby -w foo.rb shows me all of the syntax errors. In the example below i make a deliberate mistake..

#script

#!/usr/bin/ruby 
#Wed Jan  4 06:17:22 GMT 2006
class Menu
        def initialize(welcome, stage, usage)
                @welcome        = print "Welcome to de-blah-de-blah-de-blah\n\n\n"
                @usage          = usage # we will use this as a user guide
                @stage          = stage
                #`date`
                #print "which stage are you at?  
                #b:- before site work 
                #d:- during site work 
                #a:- atfer site work 
                #q:- quit\!\n" 
        end
        def to_s
                "Deskstudy: #@welcome #@usage #@stage"
        end
end

#menu = Menu.new("welcome", "usage", "stage")
menu = Menu.new("welcome", "stage")
menu.inspect
puts menu

#errors 

menu.rb:21:in `initialize': wrong number of arguments (2 for 3) (ArgumentError)
        from menu.rb:21

 On Thu, 5 Jan 2006 04:25:54 +0900
dblack@wobblini.net wrote:

> Hi --
> 
> On Thu, 5 Jan 2006, John Maclean wrote:
> 
> > Hi guys,
> >
> > There are loooads of ruby docs out there. There are also some good
> > reference guides under /usr/share/doc/ruby-1.8.3,
> > /usr/share/doc/ruby-docs-1.8.3 and /usr/share/doc/ruby-libs-1.8.3.
> > What would the more experienced of you recommend for command line
> > options? So far I've been using
> > ruby -c foo.rb
> > ruby -W foo.rb
> > as they are the simplest :)  I've not really used irb that much as I
> > haven't seen any advantage in using it.
> 
> The ones I use the most are:
> 
>    ruby -cw
>    ruby -v[e]
>    ruby -e
>    ruby -p[i.bak][ -e]
>    ruby -n[i.bak][ -e]
> 
> 
> David
> 


-- 
John Maclean
MSc (DIC)
07739 171 531