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Jonahss/event.js

Created August 27, 2015 19:20
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promisify event listeners
Raw
event.js
'use strict'
let fs = require('fs');
let B = require('bluebird');
let readStream = fs.createReadStream(__filename)
readStream.on('close', function() {
console.log('regular close cb called')
})
let on = B.promisify(readStream.on, readStream); // the second argument is important, is specifies the 'this' context to bind the function too
on('close').then(function() {
console.log('promisify close promise resolved')
})
readStream.pipe(fs.createWriteStream('/dev/null'));
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