Concatenar arrays anidados sin recursividad

gistfile1.js

function esArray(array) {
  return Object.prototype.toString.call(array) == '[object Array]'); 
} 

function desempaqueta(array,index) {
   Array.prototype.splice.apply(array, [index, 1].concat(array[index]));
}

function flatten(arr) {
  arr = arr.concat();
  var i = 0; 
  while (i < arr.length)
    if ( esArray(arr[i])) desempaqueta(arr,i);
    else i++;
  return arr;
}

var test = ["hola", ["soy", ["juan", "fernandez"] ], "y", ["no", "tengo", ["dinero"] ] ];
console.log(flatten(test));