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CoffeeScript Application Development by Ian Young

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Wrangling multiple asynchronous calls

Now that we're comfortable dealing with asynchronous operations, we'll take a look at a common use case: performing multiple asynchronous operations. The beauty of this paradigm is that these operations happen concurrently by default. Most especially with requests to remote web resources, which can often have a latency in the hundreds of milliseconds, it's hugely important that we can send a second request into the world without waiting for the first one to return. This ability comes with a few caveats, though. We'll look at some common pitfalls and learn how to navigate them with CoffeeScript's help.

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