Example of sequentially processing an array of promises

PromiseHelper.js

function PromiseHelper(){}
PromiseHelper.sequentialProcess = function(promises) {
    if(promises.length && promises.length > 0){
        return promises.reduce( function( current, acc ) {
            return current.then(acc);
        });
    }else {
        return $.when();
    }
};

var promises = [1,2,3,4,5].map(function(v){
    console.log({v:v});
    return $.when(v);
});

PromiseHelper.sequentialProcess(promises).then(function(results){
    console.log('done',results);
});