promise-back

    0.4.1 • Public • Published

    promise-back

    Augment a thunk such that it returns a promise if applied without a callback.

    Build Status Code Climate js-standard-style

    npm install promise-back --save

    You can also use Duo, Bower or download the files manually.

    npm stats

    npm NPM downloads Dependency Status

    API Example

    require
    var promiseBack = require('promise-back')
    expose dual interface async function
    var read = require('fs').readFile
    var path = require('path')
    var filepath = path.resolve(__dirname, 'package.json')
    var encoding = 'utf8'
    var readable = promiseBack(read.bind(null, filepath, encoding))

    NOTE: if you already have a function that takes a callback as it's only parameter, you can just pass it to promiseBack. Modules that expose such an interface can be passed directly to promiseBack without a wrapper; You may also use Function.prototype.bind to achieve the same.

    use callback interface
    readable(function (_, str) {
      console.log(JSON.parse(pkg).description)
    })
    //=> Augment a thunk such that it returns a promise if applied without a callback.
    use promise interface
    readable()
    .then(JSON.parse)
    .then(selectn('description'))
    .then(console.log)
    .catch(console.error)
    //=> Augment a thunk such that it returns a promise if applied without a callback.

    API

    promiseBack(fn)

    arguments
    • fn: (Function) Thunk.
    returns
    • (Function) Returns a function that when applied with a callback, returns undefined, otherwise, returns a Promise.

    Contributing

    SEE: contributing.md

    Licenses

    GitHub license

    Keywords

    none

    Install

    npm i promise-back

    DownloadsWeekly Downloads

    1

    Version

    0.4.1

    License

    MIT

    Last publish

    Collaborators

    • wilmoore