Q.js - Using deferred

Question

How do I get the value of the text from the example below?

Q.js has an example on using Deferred:

var deferred = Q.defer();
FS.readFile("foo.txt", "utf-8", function (error, text) {
    if (error) {
        deferred.reject(new Error(error));
    } else {
        deferred.resolve(text);
    }
});
return deferred.promise;

In this case, there is a node async function being used. What I want to do is get the value of text from the deferred.promise being returned. When I console.log(deferred.promise) I get this:

{ promiseSend: [Function], valueOf: [Function] }

What am I doing wrong (as I just copy/pasted the example from here: https://github.com/kriskowal/q#using-deferreds) or what else do I need to do to actually get that text from the file?

I am aware that node.js has a synchronous version of the call above - my goal is to understand how deferred works with this library.

Answer 1

See https://github.com/kriskowal/q#adapting-node

Can be rewritten in a nodejs-like:

var read = Q.nfcall(FS.readFile, FS, "foo.txt", "utf-8");
read().then( function (text) { console.log(text) } );