The value, or default when it is NULL.
- n: the value, which may be NULL.
- default: what to return for NULL.
or_else :: (n: Nullable($T), default: T) -> TThe value, or default when it is NULL.
Parameters
- n: Nullable($T)
- the value, which may be NULL.
- default: T
- what to return for NULL.
Returns
- T