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Notes

With a bigger application, it sometimes makes sense to extract out view helpers. We'll discuss the dos and don'ts of adding helpers to our application. We'll add a helper for adding user avatars using Gravatar as well as a helper and related functionality for liking shouts. The last helper we'll add will provide the ability to mention other users in our shouts. We'll also discuss the Null Object Pattern by adding a Guest object to our application.