Is there a good way to make a map case-insensitive for string keys? I first thought just wrapping some function around it would be it, but when I try it, it is really a bit more involved. Has anyone done this, or is there a recommended way?
Do you want real case-insensitivity (i.e., you preserve the case of some item in the map), or just down-casing?
To do that you need to alter the hashing and equality functions of the map.
I have a Java implementation of a DowncaseMap which downcases String keys (and thus avoids specifying the hash function), but obviously the output is lowercase. I'm happy to share.
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