If a user is offline, I'd like to load tableview data from a cached file (saved to the filesystem the last time the user was online and fetched the data via XHR).

I use an array of rows (each row has 3 labels) as the data for the tableview. How can I serialize this array to a string, store it in a file, and later pull it out and use it to populate the data for a tableview?

This does not work:

//Save to file
var json = JSON.stringify(arrayTableData);
var fileName = 'test.json';
var file = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, fileName);

file.write(json);

//Load from file
var fileName = 'test.json';
var file = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, fileName);

if (file.exists()) {
  var json = file.read();
  tableView.setData(JSON.parse(json));
}