Function flatMap

flatMap<T, U>(
option: OptionType<T>,
fn: (value: T) => OptionType<U>,
): OptionType<U>
Chain an Option-returning computation. None short-circuits. Supports data-first and curried (pipe-friendly) forms.
Type Parameters
- T
- U
Parameters
- option: OptionType<T>
- fn: (value: T) => OptionType<U>
Returns OptionType<U>
Example
```
const street = pipe(
    findUser(id),
    flatMap((u) => fromNullable(u.address)),
    flatMap((a) => fromNullable(a.street)),
  )
```
- Defined in option/transform.ts:39
flatMap<T, U>(
fn: (value: T) => OptionType<U>,
): (option: OptionType<T>) => OptionType<U>
Chain an Option-returning computation. None short-circuits. Supports data-first and curried (pipe-friendly) forms.
Type Parameters
- T
- U
Parameters
- fn: (value: T) => OptionType<U>
Returns (option: OptionType<T>) => OptionType<U>
Example
```
const street = pipe(
    findUser(id),
    flatMap((u) => fromNullable(u.address)),
    flatMap((a) => fromNullable(a.street)),
  )
```
- Defined in option/transform.ts:40