Observer pattern is used when there is one-to-many relationship between objects such as if one object is modified, its depenedent objects are to be notified automatically. Observer pattern falls under behavioral pattern category.
Read moreIs event an observer pattern?
The Observer pattern offers a subscription model in which objects subscribe to an event and get notified when the event occurs . This pattern is the cornerstone of event driven programming, including JavaScript. The Observer pattern facilitates good object-oriented design and promotes loose coupling.
Read moreWhat are events and observers in ORM?
Observers are basically predefined events that happen only on Eloquent Models (creating a record, updating a record, deleting, etc). Events are generic, aren’t predefined, and can be used anywhere, not just in models.
Read moreWhat is a concrete Observer?
The ConcreteObservers are classes that contain information specific to the current instance . The update function is called by the subject’s notify() operation. The observers update independently based on their current state. The Observer is the parent class of the concrete observers.
Read more