gistfile1.js

// -------- Database section
// current version
var __versions__ = ['1.0.1','1.0.2','1.0.3'];
var __version__ = localStorage.getItem('db:version')
	||__versions__[__versions__.length-1];

function migrate_1_0_1() {
console.log('going into migrate_1_0_1');
}
function migrate_1_0_2() {
console.log('going into migrate_1_0_2');
}
function migrate_1_0_3() {
console.log('going into migrate_1_0_3');
}

function migrate() {
	for(var i=0, j=__versions__.length; i<j; i++) {
		if(__version__<__versions__[i]) {
			__version__=__versions__[i];
			window['migrate_'+__version__.replace('.','_')]();
		}
        }
	localStorage.setItem('db:version',__version__);
}