Filesystem MODE_APPEND

app.js

var f = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, 'text.txt');
Ti.API.info('file = ' + f);
var contents = f.read();
Ti.API.info('exists = ' + f.exists());
Ti.API.info("contents blob object = "+contents);
Ti.API.info('contents = ' + contents.text);

var newFile = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory,'newfile.txt');
Ti.API.info('mode: '+ Ti.Filesystem.MODE_APPEND);
newFile.write(f.read());
newFile.write('line 5555');
Ti.API.info('newfile: '+newFile.read());