rsvp.js

I'm new to promises and using the rsvp implementation. I want to asynchronously read a list of files, then proceed to another task only when all files have been read. I've got as far as the basic structure to read one file, and chain to the next task: var loadFile = function (path) { return new rsvp.Promise(function (resolve, reject) { fs.readFile (path, 'utf8', function (error, data) { if (error) { reject(error); } resolve(data); }); }); }; loadFile('src/index.txt').then(function (data) { console.log(data); return nextTask(data); }).then(function (output) { //do something with output }).catch

I think Promise.resolve and new Promise(resolve) are interchangeable. Consider this: A. new RSVP.Promise(function (resolve, reject) { resolve(); }).then(function () { return new RSVP.Promise(function (resolve) { resolve("HI") }); }).then(function (result) { console.log(result); }); B. new RSVP.Promise(function (resolve, reject) { resolve(); }).then(function () { return RSVP.resolve("HI"); }).then(function (result) { console.log(result); }); Both print "HI" as I expected. So I think if I don't need to "reject" anything. I can just write RSVP.resolve(); for simplicity. But consider this example:

I'm using the RSVP library distributed inside Ember.js and I'm trying to figure out the correct pattern for reporting fatal errors inside a promise -- particularly I want to inform of something that's almost certainly the result of a programming error due to api misuse and I want to do it in a LOUD way. I'm new to promises and javascript in general, hopefully this question makes sense Here's a simple example (in coffeescript): doAsync = (arg, callback) -> throw new Error('you gave me a way bad arg, I fail for you!') promiseReturningApi = (data) -> return new Ember.RSVP.Promise (resolve, reject

Similar question to Promise resolve before inner promise resolved but I can't get it to work nontheless. Every time I think I understand promises, I prove myself wrong! I have functions that are written like this function getFileBinaryData () { var promise = new RSVP.Promise(function(resolve, reject){ var executorBody = { url: rootSite + sourceRelativeUrl + "/_api/web/GetFileByServerRelativeUrl('" + fileUrl + "')/$value", method: "GET", binaryStringResponseBody: true, success: function (fileData) { resolve(fileData.body); }, error: function (argument) { alert("could not get file binary body")

I have an array of promises that need to run in sequential order. var promises = [promise1, promise2, ..., promiseN]; Calling RSVP.all will execute them in parallel: RSVP.all(promises).then(...); But, how can I run them in sequence? I can manually stack them like this RSVP.resolve() .then(promise1) .then(promise2) ... .then(promiseN) .then(...); but the problem is that the number of promises varies and array of promises is built dynamically. If you already have them in an array then they are already executing. If you have a promise then it's already executing. This is not a concern of promises