From: RichardOnRails <RichardDummyMailbox58407@...>
Date: 2010-10-01T00:30:17+09:00
Subject: Re: GetoptLong usage

On Sep 30, 10:38 am, Stefano Crocco <stefano.cro...@alice.it> wrote:
> On Thursday 30 September 2010, RichardOnRails wrote:
>
>
>
> > |Hi,
> > |
> > |I'm using Example:http://rubylearning.com/satishtalim/ruby_arrays.html
> > |as a guide to GetoptLong usage.  I get the message:
> > |
> > |uninitialized constant GetoptLong::OptionalArgument (NameError)
> > |
> > |for line 10 of the program listed below (with line 10 flagged).  Can
> > |anyone point me to a working example of GetoptsLong usage?
> > |
> > |Thanks in Advance,
> > |Richard
> > |
> > |# SummarizeBalances.rb
> > |# K:\_Projects\Ruby\_Ruby_Apps\InvestmentSW
> > |# Example:http://rubylearning.com/satishtalim/ruby_arrays.html
> > |
> > |require 'GetoptLong'
> > |
> > |    puts "Args = " + ARGV.join(", ")
> > |
> > |    opts = GetoptLong.new(
> > |  [       "--from", "-f",  GetoptLong::OptionalArgument],     # Line 10
> > |  [       "--to", "-t",  GetoptLong::OptionalArgument],
> > |  [       "--weeks_until", "-w",  GetoptLong::OptionalArgument]
> > |    )
> > |
> > |    # Process the arguments
> > |    opts.each { |opt, arg|
> > |  puts %{%s => "%s"} % [opt, arg]
> > |    }
> > |    rem_args = ARGV.join(", ")
> > |    puts "Remaining args = %s" % [rem_args] if rem_args
>
> As you can see from the link you posted, the constant name is
> GetoptLong::OPTIONAL_ARGUMENT, not GetoptLong::OptionalArgument. However, I'd
> consider using OptionParser (which, like GetoptLong is included in the ruby
> standard library) rather than GetoptLong, since it provides a much more ruby-
> oriented interface.
>
> Stefano

Hi Stefano,

Excellent response.

>> As you can see ...
Admittedly, I did see the syntax in the example.  What I didn't see,
alas, was the precise option I wanted to use.  By time I clicked my
SciTE editor, thus overlaying the example,  I forgot the syntax.
Remembering the words was all I could muster.  Sad tale :-)

>> OptionParser
Looks good, especially the comprehensive example.

Best wishes,
Richard