Option Parsing for node.js scripts

optparse.js

/*
* returns [{opts}, [args]]
*/
var optParse = function(argv){
  var opts = {}
    , args = []
	  
  for(var i in argv){
  	var x = argv[i]
    if (x[0] == '-'){
      // either flag, in which case store true, or opts	
      if (x.indexOf('=') == -1){
	  	opts[x] = true
	  } else {
	  	var flag = x.slice(0, x.indexOf('='))
	  	  , val = x.slice(x.indexOf('=')+1);
	  	opts[flag] = val;  
	  }	
	} else {
	  args.push(x)
	}
  }  
  return [opts, args]
}