Hello
Callback hell has been mentioned a few times (mainly by Nathan) and it is something that has been bugging me recently because I have indeed fallen into this trap. It is also known as the "pyramid of doom" because your code can end up looking like an ever increasingly complicated list of nested function calls.
However, mainly because Sails uses it "out of the box", I have educated myself in the use of "Promises". Promises allow you to write your asynchronous code in a synchronous way, such that callback hell can be eliminated.
I won't go into the details here, but if you are interested, look up
https://github.com/kriskowal/q
Waterline ORM also uses a promises library called "bluebird":
http://bluebirdjs.com/docs/getting-started.html
I have refactored a lot of horrific code now that I have a grip on this technique.....promises are beautiful thing!
Kevin
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