docs: function msetnx() {
    var args = slice.call(arguments)
      , i
      , req;
  
    // got a req object
    if(typeof args[args.length -1] === 'object') {
      req = args.pop();
    }
  
    for(i = 0;i < args.length;i += 2) {
      if(this.keyExists(args[i], req)) {
        return 0;
      }
    }
  
    for(i = 0;i < args.length;i += 2) {
      this.setKey(args[i], args[i + 1], undefined, undefined, undefined, req);
    }
  
    return 1;
  }