What specific map are you looking for?

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javascriptfunction workMyCollection(arr) { return arr.map(item=> doSomethingAsync(item));}

function workMyCollection(arr) { return arr.reduce((promise, item)=> promise.then(result=> doSomethingAsync(item)), Promise.resolve());}

map

function workMyCollection(arr) { return q.all(arr.map(function(item) { return doSomethingAsync(item); })); } reduce

function workMyCollection(arr) { return arr.reduce(function(promise, item) { return promise.then(function(result) { return doSomethingAsyncWithResult(item, result); }); }, q()); }