As developers, we kind of have a love/hate relationship with learning new things. It's great when new updates, features, or software can help us solve problems and code better. On the other hand, with so much software development information already out there, learning yet another new thing can be overwhelming.
Sometimes, when we request data or carry out an operation, the result may change over time. When this happens, we can refer to the source of these events as the emitter. When the emitter updates the value, subscribers can receive the new value.
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