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Feature #11191

Updated by nobu (Nobuyoshi Nakada) about 5 years ago

Simply collecting configuration values is a very popular use for OptionParser. Code like this is quite common: 

 ~~~ruby ~~~ 
 config = {} 
 opts = OptionParser.new do |o| 
   o.on "-h", "--host=HOST", "hostname" do |h| 
     config[:host] = h 
   end 
   o.on "-p", "--port=PORT", "port", Integer do |p| 
     config[:port] = p 
   end 
   o.on "-v", "--verbose" do 
     config[:verbose] = true 
   end 
   o.on "-q", "--quiet" do 
     config[:quiet] = true 
   end 
 end 
 opts.parse! 
 # do something with config values 
 ~~~ 

 This boilerplate is one of the reasons I built Slop: https://github.com/leejarvis/slop 

 I'd like to add a `to_h` method to OptionParser which returns a Hash containing the switch name and switch argument values. This would reduce the above example to: 

 ~~~ruby ~~~ 
 opts = OptionParser.new do |o| 
   o.on "-h", "--host=HOST", "hostname" 
   o.on "-p", "--port=PORT", "port", Integer 
   o.on "-v", "--verbose" 
   o.on "-q", "--quiet" 
 end 
 ~~~ 

 With this example, the output would look something like: 

 ~~~ruby ~~~ 
 opts.parse %w(--host localhost --port 8000 --verbose) 
 puts opts.to_h #=> 
   {:host=>"localhost", :port=>8000, :verbose=>true, :quiet=>nil} 
 ~~~ 

 I've attached a patch that implements this functionality in quite a basic way. I'm very keen to hear what others think. 

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