Careful, `@options[:parse_ts]` might be false.

```ruby
# for example ...
@options[:parse_ts] = false
@options[:parse_ts] ||= true
@options[:parse_ts]   # Now it's true, even though it was set to false.
```

Just make a defaults hash instead

```ruby
defaults = {:parse_ts => true}
@options = defaults.merge(options)
```