Function map

map<T, U>(option: OptionType<T>, fn: (value: T) => U): OptionType<U>
Apply fn to the value inside a Some; leave None unchanged. Supports data-first and curried (pipe-friendly) forms.
Type Parameters
- T
- U
Parameters
- option: OptionType<T>
- fn: (value: T) => U
Returns OptionType<U>
Example
```
const upper = pipe(
    fromNullable(user.name),
    map((n) => n.toUpperCase()),
  )
```
- Defined in option/transform.ts:14
map<T, U>(fn: (value: T) => U): (option: OptionType<T>) => OptionType<U>
Apply fn to the value inside a Some; leave None unchanged. Supports data-first and curried (pipe-friendly) forms.
Type Parameters
- T
- U
Parameters
- fn: (value: T) => U
Returns (option: OptionType<T>) => OptionType<U>
Example
```
const upper = pipe(
    fromNullable(user.name),
    map((n) => n.toUpperCase()),
  )
```
- Defined in option/transform.ts:15