Function fromNullable

fromNullable<T>(value: T | null | undefined): Maybe<T>
Lift a nullable value into Maybe<T> — null and undefined become None; anything else becomes Some.
Type Parameters
- T
Parameters
- value: T | null | undefined
Returns Maybe<T>
Example
```
fromNullable(map.get(key));     // Maybe<V>
fromNullable(null);             // None
```
- Defined in maybe.ts:55