Bypassing self: When is it a Good Idea?

You've provided a lengthy response that doesn't answer the question. It seems like you copied and pasted the same text multiple times.

Understanding NSSortDescriptor and Nil Values: How to Sort Arrays of Custom Objects Without Nil Values

Understanding SQLite Bulk Inserts on iPhone: A Deep Dive into Error Handling and Sequence Integrity

Understanding Delegates in UIKit and Solving a Specific Problem with Tag Values