Normalizing a path

gistfile1.js

var normalize = function(path, delimiter) {
  if (delimiter == null) {
    delimiter = '/';
  }

  var pathArr = path.split(delimiter);
  var newPath = [];

  for (var i = 0, j = pathArr.length; i < j; i++) {
    (function(item) {
      if (item) {
        if (item === '..') {
          return pathArr[i + 1] = '';
        }

        if (item === '.') {
          return;
        }

        newPath.push(item);
      }
    })(pathArr[i]);
  }

  return newPath.join(delimiter);
};