This is a simple array dimension library example which is build on like jquery (another kind of modular pattern example)

arrayDimensionJqueryLikeModulePattern.js

var fn = (function(){

  /*
  ** This function is deciding whether array is either
  ** 2D or 1D or array is fully proper array or not.
  ** @params args taking arguments
  ** @params arg[0] : Array
  ** @params arg[1] : callback function
  */
  function arrayDimention(){
    var args = Array.prototype.slice.call(arguments);
    return (args[0].length === 0) ? args[1]('Array is empty') : args[1](f1(args[0]));
  }

  function f1(arr){
   var arrr = [];
   for(var i in arr){
     arrr.push(Array.isArray(arr[i]));
   }
   return (arrr.indexOf(true) > -1) ? (arrr.indexOf(false) > -1) ? 'Please check your array' : '2D' : '1D';
  }

  /* returning public function for the api
  ** this public function is accessable to user
  */
  return {
   arrayDimention : arrayDimention
  }
})();