otherwise

v0.9.6

STATUS

Passing

DOWNLOADS

VISIBILITY

Public

PUBLISHED

5 years ago

SIZE

4 KB

Returns the result of applying the onFailure function to the value inside a failed promise.

Async

Promise

1 contributor

Install otherwise as a package?

Copied

npm i @bit/justin-capalbo.ramda.otherwise

Set Bit as a scoped registryLearn more

npm config set '@bit:registry' https://node.bit.cloud

Component Example

React

Vue

Angular

React Native

Add dependency...

Just

import

any of the 1 million components

and packages in Bit or NPM to the example.

import Button from '@bit/grommet.grommet.button';
import Lodash from 'lodash';

No preview available

modifieddraft

otherwise (

onFailure:Function,

p:Promise

) : Promise

Returns the result of applying the onFailure function to the value inside a failed promise. This is useful for handling rejected promises inside function compositions.

Example

var failedFetch = (id) => Promise.reject('bad ID');
     var useDefault = () => ({ firstName: 'Bob', lastName: 'Loblaw' })

     //recoverFromFailure :: String -> Promise ({firstName, lastName})
     var recoverFromFailure = R.pipe(
       failedFetch,
       R.otherwise(useDefault),
       R.then(R.pick(['firstName', 'lastName'])),
     );
     recoverFromFailure(12345).then(console.log)

Arguments

onFailure: Function

The function to apply. Can return a value or a promise of a value.

p: Promise

Returns

Promise

The result of calling `p.then(null, onFailure)`