From: Robert Klemme <shortcutter@...>
Date: 2012-05-31T01:47:01+09:00
Subject: Re: Newbie question: command line to execute a method from .rb file

On Wed, May 30, 2012 at 6:26 PM, n/a n/a <lists@ruby-forum.com> wrote:
> Hi there -
>
> So, I'm sorry for this very basic question which makes me feel like a
> real dummy... But honestly I couldn't find the answer from many internet
> tutorials, nor from the book I am reading, called "Ruby: the
> foundations...".
>
> So, pretty basic, I have a test.rb file which contains:
>
>
> def fonction1
>  puts "Here we are - func1"
> end
>
> def fonction2
>  puts "Here we are - func2"
> end

Not sure what those functions are used or intended for - I cannot see
any invocation of them.

> def test(*arg)
>  countArgs = 0;
>  arg.each {|param|
>    t[countArgs] = param
>    countArgs = countArgs+1
>  }
>  countArgs = countArgs+1

This increment is too much. But you do not need to count manually
because you can get the count directly via args.size.

>  puts "You called me with #{count-args} argument(s) as parameters"
>
>  return t
> end
>
>
> Now, I'm still trying to figure out the COMMAND LINE to eventually
> execute my test() function of test.rb.
> I want to try on different cases, test(a,b,c), test("yoyo", "yaya"), ...

Well, if you want to do that just include those calls in the script:

test(a,b,c)
test("yoyo", "yaya")

> I tried ruby test.rb test() , but of course, this isn't it.

If you want to find out the arguments to the program, then this is easiest:

puts "You called me with #{ARGV.size} argument(s) as parameters"

Then just invoke it with

$ ruby your-script.rb arg1 arg2

If you want to use your method #test to evaluate program arguments you can do

test(*ARGV)

But I am not 100% sure I understood what you're after.

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/