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Introducing the optparse-simple gem
Tuesday, 11 May 2010 10:32
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The optparse-simple gem uses a Polyrex document to fetch, and validate command-line arguments into a simple hash.

*installation* 

sudo gem1.9.1 install optparse-simple



Successfully installed optparse-simple-0.2.0

1 gem installed

Installing ri documentation for optparse-simple-0.2.0...

Updating class cache with 3148 classes...

Installing RDoc documentation for optparse-simple-0.2.0...


Polyrex schema: options/option[name,switch,alias,value,mandatory]/error[msg]

*example*

require 'optparse-simple'
args = %w(-s --list=45 refresh filename filexx3)
h = OptParseSimple.new('/home/james/learning/ruby/optionsx.xml', args).to_h
#=> {:list=>"45", :sort=>nil, :refresh=>nil, :file1=>"filename", :file2=>"filexx3"}


file: optionsx.xml


Note: The error messages within each option are positioned by priority (mandatory being 1st, followed by value).

Resources:
- jrobertson's optparse-simple at master [github.com]
- Using OptParseSimple [dzone.com]

*update: 11-May-2010 @ 5:23pm*
To catch errors use the RuntimeError case e.g.

require 'optparse-simple'

begin
args = %w(-s --list=45 refresh filename filexx3 dhgf)
h = OptParseSimple.new('/home/james/learning/ruby/optionsx.xml', args).to_h
rescue RuntimeError => myStandardError
puts myStandardError
end
#=> invalid option: dhgf not recognised


see Handle exceptions in Ruby [dzone.com]

Read more: http://feeds.dzone.com/~r/dzone/snippets/~3/CKarMibsZDk/11315
 
Refresh a web page using JavaScript
Sunday, 21 March 2010 16:21
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Source: JavaScript Refresh Page [quackit.com]

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