how to filter keys from localStorage with a regex

findLocalItems.js

// returns an array of localStorage items in key/value pairs based on a query parameter
// returns all localStorage items if query isn't specified
// query can be a string or a RegExp object

function findLocalItems (query) {
  var i, results = [];
  for (i in localStorage) {
    if (localStorage.hasOwnProperty(i)) {
      if (i.match(query) || (!query && typeof i === 'string')) {
        value = JSON.parse(localStorage.getItem(i));
        results.push({key:i,val:value});
      }
    }
  }
  return results;
}