Manipulate the arguments

args.coffee

f = (a, b, c...) -> 
  console.log "arguments: #{a}, #{b}, #{c}".replace(/, $/,"")
  for arg, i in arguments 
    console.log "#{i}: #{arg}"

f "ruby"
#"ruby"
#"0: ruby"
f "ruby", "coffeescript"
###
"ruby","coffeescript"
"0: ruby"
"1: coffeescript"
###
f "ruby", "coffeescript", "lisp"
###
"ruby","coffeescript", "lisp"
"0: ruby"
"1: coffeescript"
"2: lisp"
###

args.js

var f = function(a, b){
    var args = Array.prototype.slice.call(arguments);
    console.log("arguments: " +  args.join(","));
    
    for(var i = 0; i < arguments.length; i++){
        console.log(i.toString() + ": " + arguments[i]);
    }
}

f("ruby");
//"ruby"
//"0: ruby"
f("ruby", "coffeescript");
/*
"ruby","coffeescript"
"0: ruby"
"1: coffeescript"
*/
f("ruby", "coffeescript", "lisp");
/*
"ruby","coffeescript", "lisp"
"0: ruby"
"1: coffeescript"
"2: lisp"
*/

result_args.js

var f,
  __slice = [].slice;

f = function() {
  var a, arg, b, c, i, _i, _len, _results;
  a = arguments[0], b = arguments[1], c = 3 <= arguments.length ? __slice.call(arguments, 2) : [];
  console.log(("arguments: " + a + ", " + b + ", " + c).replace(/, $/, ""));
  _results = [];
  for (i = _i = 0, _len = arguments.length; _i < _len; i = ++_i) {
    arg = arguments[i];
    _results.push(console.log("" + i + ": " + arg));
  }
  return _results;
};

f("ruby");
f("ruby", "coffeescript");
f("ruby", "coffeescript", "lisp");