interview-question-1.js

Function.prototype.call = function (context) {
  var args = [];

  args.push.apply(args, arguments)
  args.shift();

  return this.apply(context, args);
}
 

partyWith = function () {
  var args = Array.prototype.slice.call(arguments, 0),
    message = "We're partying with ";
    
    for (var i in args) { 
      var name = args[i];
      
      if (i !== args.length + 1) {
        name += ", "
      }
      
      message += name;
    }
    
    return message;
}