nodejs-q

Q is a tool for making and composing asynchronous promises in JavaScript. If a function cannot return a value or throw an exception without blocking, it can return a promise instead. A promise is an object that represents the return value or the thrown exception that the function may eventually provide. A promise can also be used as a proxy for a remote object to overcome latency. Q can exchange promises with jQuery, Dojo, When.js, WinJS, and more. Additionally, there are many libraries that produce and consume Q promises for everything from file system/database access or RPC to templating.

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