inline async js

inline.js

module.exports = function inline(functions){
    /*
    ,function(next,done){
        //
        next();
    }
    */
    functions.reverse();
    return function(done) {
        var fn = [];
        var count = 0;
        for (var i = 0; i < functions.length; i++) {
            fn.push(functions[i]);
        }
        var next = function() {
            var curFN = fn.pop();
            ++count;
            if (count == functions.length) {
                if(done) curFN(done,done);
            }
            else {
                curFN(next,done);
            }
        };
        if (fn.length >= 1) {
            next();
        }
        else {
            if(done) done();
        }
    };
};