Observer パターン
1. Observer patternThe observer pattern is a software design pattern in which an object, called the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods. It is mainly used to implement distributed event handling systems. Observer is also a key part in the familiar MVC architectural pattern. In fact the observer pattern was first implemented in Smalltalk's MVC based user interface framework.
Read “Observer pattern” on English Wikipedia
Read “Observer パターン” on Japanese Wikipedia
Read “Observer pattern” on DBpedia
Read “Observer pattern” on English Wikipedia
Read “Observer パターン” on Japanese Wikipedia
Read “Observer pattern” on DBpedia
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