iamleeg/BrowseOverflow — pull request #2 by iamleeg (2012-05-28 17:03:40+00:00)
Title: Bug1

# SPOILER ALERT

Readers of [Test-Driven iOS Development](http://www.informit.com/store/product.aspx?isbn=0321774183) may wish to try fixing #1 themselves before reading the code in this pull request.

## Fixes #1

This pull request addresses the problem noted in Chapter 10 of the book and raised here as #1, that the application introduces duplicate entries in a topic's question list if it loads the same question multiple times.

## Further work

While the pull request addresses the reported problem, it uncovers another; the data model in the app can't distinguish different versions of an entity. As an example, two questions that are in the same place (i.e. have the same ID) but different time (i.e. one represents a future edit of the other) cannot be told apart.