Quick Argument Parsing

[DtY]

Well, I'm sure there are huge libraries that do this, and make documentation for you and all that, but here's my quick one:

Ruby:

args = [ ] ARGV.each do |a|     if a[0,2] == "--"         key = a[2..-1].split "="         if $prefs.has_key? key[0]             $prefs[key[0]] = (key[1] or true) #Sets option to true if no value given         else             $stderr.puts "Error: No option '#{key[0]}'"         end     else         args.push a     end end

To use it, make a hash called $prefs holding the default values for all your preferences. When the program is run, it goes through each argument and if it starts with "--" then it checks if that key is in prefs, if it is it changes the value with the part after = (or true if they give nothing after), or else it dies telling the user that that is an invalid option. If it doesn't start with "--", it is pushed onto args. args now contains all your unnamed arguments, and prefs the named ones.

[wtd]

Ruby:

args = [ ] ARGV.each do |a|     if a[0,2] == "--"         key, value = a[2..-1].split "="         if $prefs.has_key? key             $prefs[key[0]] = (value or true) #Sets option to true if no value given         else             $stderr.puts "Error: No option '#{key}'"         end     else         args.push a     end end