On Mar 16, 2009, at 8:57 AM, Paul Sanders wrote:
Why not just subclass NSDictionary to do this? Seems straightforward to me.
That would certainly be viable. I made a different assumption than you; namely that the strings should continue to hash and isEqual: as case insensitive outside of the specialized collection. Your assumption is that the behavior is only needed in the collection.
Both assumptions are perfectly valid and it is entirely up to the OP to determine which is required.
What is swizzling?
The Objective-C runtime is truly dynamic in that it provides all of the API to define new classes and **edit existing classes** at runtime.
Swizzling is the act of replacing a method implementation with a new implementation which possibly calls through to the original implementation.
It is extremely useful for debugging, but should never be used in production systems in anything but as a last resort and, even then, only after putting in the protections necessary to limit it to particular releases of whatever it is being swizzled.
Swizzling breaks implementation encapsulation and, thus, is exceedingly fragile.
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