Promises are at least 5 kinds of awesome. Functionally they are not all that different from callbacks, but those differences resolve code structure problems caused by the more traditional async library and callback approach. They also change the way we approach development.
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I recently joined Runnable, a service that’s built on a service and event-driven architecture. Having come from a series of monoliths, it’s taken some adjustments, some of which go well beyond simple syntax. Using microservices and events changed the way I think.
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