fx-flow v0.7.0 / flow / errThen

Function: errThen()

errThen(fn, result)

errThen<A>(fn, result): MaybePromise<Result<A>>

Call fn if result is failure.

Type parameters

• A

Parameters

• fn

• result: Result<A>

Returns

MaybePromise<Result<A>>

Example

const userInfo = (await errThen(queryUserInfo, err(userId))).unwrap() // throw an error
// with flow
const userInfo = (await flow(ok(userId), andThen(queryUserInfo), errThen(notify))).unwrapOr(defaultUserInfo)

More examples

Source

packages/core/src/flow/errThen.ts:18

errThen(fn)

errThen<A>(fn): (result) => MaybePromise<Result<A>>

Type parameters

• A

Parameters

• fn

Returns

Function

Parameters

• result: Result<A>

Returns

MaybePromise<Result<A>>

Source

packages/core/src/flow/errThen.ts:19

errThen(fn, result)

errThen<A>(fn, result): Result<A>

Type parameters

• A

Parameters

• fn

• result: Result<A>

Returns

Result<A>

Source

packages/core/src/flow/errThen.ts:20

errThen(fn)

errThen<A>(fn): (result) => Result<A>

Type parameters

• A

Parameters

• fn

Returns

Function

Parameters

• result: Result<A>

Returns

Result<A>

Source

packages/core/src/flow/errThen.ts:21