By Terry Jones
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Table 2-1 shows the naming correspondence. If you call a deferred method named in the left column with some set of arguments, all the callbacks added via the promise method named in the right column will be invoked, in the order they were added, each with the same set of arguments. Putting It All Together | 17 Table 2-1. Correspondence between deferred and promise method names Deferred method Promise method resolve or resolveWith done reject or rejectWith fail notify or notifyWith progress Deferred Dynamics Here is a summary of aspects of deferred behavior (some of which were described at length earlier) that you need to understand, along with some principles of deferred usage: • If your code creates a deferred but doesn’t eventually cause it to be resolved or rejected, you’re probably doing it wrong.
Change the shutdown code so that it first waits for the pool of HTTP GET requests to empty, then adds shutdown promises to the pool, and then waits again for the pool to empty before exiting. 5. Change createPromisePool to allow the caller to pass a function. The function should be evaluated each time an outstanding promise fires and if it returns true, resolve all the waiting deferreds. You might like to pass the function the number of items in the inProgress list, or even the list itself (if you’re the trusting type).
Learning jQuery Deferreds by Terry Jones