What is the advantage of flutter?

Flutter is an open-source software development kit which enables smooth and easy cross-platform mobile app development . You can build high quality natively compiled apps for iOS and Android quickly, without having to write the code for the two apps separately. All you need is one codebase for both platforms.

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What is observer in flutter?

The Observer design pattern should be used when a change to one object requires changing others, but you don’t know how many objects need to be changed and how . The pattern allows subscribing to such object events and changing the dependent object’s state accordingly.

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