You could swizzle the objectForKey: and setObject:forKey: methods with
your own that just lowercase the passed in string and then call the
actual methods with the new key.
Dave
Sent from my iPod
On Mar 16, 2009, at 8:02 AM, Roland King <r...@rols.org> wrote:
Any good ideas for doing a key-case-insensitive NSDictionary of
NSString to NSString? I have some HTTP headers I want to stick in a
dictionary and look up later. HTTP headers have case-insensitive keys.
I could upper, or lowercase the key before putting it in the
NSMutableDictionary, but that means I lose the original case of the
key (I probably shouldn't care but I hate throwing away
information), and any user of my class has to know to upper or
lowercase the key before looking it up, or else I don't expose the
dictionary at all and just give lookup methods which hide the
details. That's a shame, I wanted the user to have access too all
the keys if they wanted it and wanted to just make the NSDictionary
available as a property.
I could make a case-insensitive string, but subclassing NSString
wasn't in my plans for Monday evening, or Tuesday and the user still
has to make the same NSCaseInsensitiveString() object to look up the
key.
I could make a case-insensitive version of NSMutableDictionary
which ... oh that's worse, forget I even said that.
I think I'm going to lower-case on insert and tell the user the
NSDictionary of headers has lower-case keys but .. is there
something obvious I missed?
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