5 points ibobev 1 day ago 2 comments
gus_massa 11 hours ago | parent
Yep, I wondered that for a few optimizations in Racket. It's harder than it looks, probably something about covariant or contravariant types, I gave up.
comrade1234 19 minutes ago | parent
Isn't NSMutableArray a subclass of NSArray in a few languages?