Peter Kellner and Ed Spencer present at a local meetup in Silicon Valley:

Peter introduces MVC and demonstrates an application he has created with these principles.

Ed shows how to use Ext JS 4's new features to create well-structured applications - and then answers a whole range of questions relating to Sencha and its framework technologies.

You can see Ed's slides at

[NB a small section of Peter's presentation was not recorded correctly. Also apologies for the sound quality - the meetup was in an open-plan area]

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