getOption.js

Option.prototype.getOption = function(setting) {
  var ref = this;
  setting = setting.split('.');

  while (setting.length) {
    if(!(ref = ref[setting.shift()])) break;
  }
  return ref;
}

works with something like this

> a
{ table: { rows: 1 }, get: [Function] }
> a.get('table')
{ rows: 1 }
> a.get('table.rows')
1
> a.get('table.rows.asdasdasd')
undefined
> a.get('asdf')
undefined