The Iterator pattern
Things were going well for Kitty as she worked on the control system, making liberal use of the Command pattern. Then, she hit something of a roadblock. Kitty’s command receiver logic was just taking bicycle orders from the customer ordering systems, such as direct sales, and the dealerships. The requests were processed in the order they were received. Due to this, Kitty and Phoebe noticed a slowdown. While the algorithms in AssemblyLineReceiver were optimized to efficiently produce bicycles, Kitty failed to consider the painting process.
The costliest part of the painting process in terms of time and money was setting everything up to paint a bicycle. This was very easy earlier when each bicycle was only allowed to be built in one color. Now, Bumble Bikes supports custom paint jobs. The sisters were losing time and money on custom jobs because the paint equipment had to be thoroughly cleaned and reset when a custom order was placed. The paint system...
