This is an example of bad terminology (or arguably a defective class library) clouding one's understanding. If you change the title to "MUTABLE arrays considere

This is an example of bad terminology (or arguably a defective class library) clouding one's understanding. If you change the title to "MUTABLE arrays considered somewhat harmful", all of his complaints ring true. Merely changing the way arrays are defined makes the solution simple and obvious. I am frequently impressed by the subtle aspects that Cocoa got right (another example is autorelease pools).