True Myth / toolbelt / fromMaybe

Function: fromMaybe()

Call Signature

fromMaybe<T, E>(errValue, maybe): Result<T, E>

Transform a Maybe into a Result.

If the Maybe is a Just, its value will be wrapped in the Ok variant; if it is a Nothing, the errValue will be wrapped in the Err variant.

Type Parameters

T

T extends object

E

E

Parameters

errValue

E

A value to wrap in an Err if maybe is a Nothing.

maybe

Maybe<T>

The Maybe to convert to a Result.

Returns

Result<T, E>

Call Signature

fromMaybe<T, E>(errValue): (maybe) => Result<T, E>

Transform a Maybe into a Result.

If the Maybe is a Just, its value will be wrapped in the Ok variant; if it is a Nothing, the errValue will be wrapped in the Err variant.

Type Parameters

T

T extends object

E

E

Parameters

errValue

E

A value to wrap in an Err if maybe is a Nothing.

Returns

(maybe) => Result<T, E>