Node async compose. Reference for blog post at http://www.noiregrets.com/blog/2013/09/08/c2c15dbf/Functional-NodeJS-callback-composition

gistfile1.js

var toArray = Function.prototype.call.bind(Array.prototype.slice);

function partial(fn/*, ...args*/) {
    var args = [].slice.call(arguments, 1);
    return function() {
        var lastArgs = toArray(arguments);
        return fn.apply(this, args.concat(lastArgs));
    };
}

function partialRight(fn/*, ...args*/) {
    var args = [].slice.call(arguments, 1);
    return function() {
        var firstArgs = [].slice.call(arguments);
        return fn.apply(this, 
            firstArgs.concat(args));
    };
}

function handleError(errback, callback) {
    return function(err) {
        err ?
            errback(err) :
            callback.apply(this,
                [].slice.call(arguments, 1));
    };
}

function composeAsync() {
    var fns = toArray(arguments);
    return function() {
        var args = toArray(arguments);
        var next = args.pop();
        var nextOnError = partial(handleError, next);
        var callFns = fns.map(nextOnError);
        
        var call = callFns.reduce(function(next, fn) {
            return partialRight(fn, next);
        }, next);
        call.apply(this, [ null ].concat(args));
    };
}