Const futureTap = future => data => future(data) .map(()

Question

Const futureTap = future => data => future(data) .map(()

=> data)

const translateError = msg => () => new Error(msg)
const notifyErr = translateError('Error while sending notification')
const noUserFound = translateError('No user found')
const saveErr = translateError('Error occurred while saving task')

const saveTask = encaseP(TaskModel)
.mapRej(saveErr)

const saveNotify = encaseP2(
NotificationService.sendNotification
).mapRej(notifyErr)

const findUser = encaseP(UserModel.findById)
.chain(user => !!user ? resolve(user) : reject())
.mapRej(noUserFound)

const asyncTask = findUser(1)
.chain( ({id}) => savedTask({userId: id}) )
.chain( futureTap(saveTask) )
.chain( futureTap(saveNotify) )

Мне в конце лень стало)

Без do нотации грустновато

#frontend #javascript #programming #react.js #russian

0

08.02.2018

1 ответов

8 просмотров

Sergey Sova · Accepted Answer

Sergey Sova

не очень лаконично((

0

08.02.2018

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Const futureTap = future => data => future(data) .map(()

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