Question

to
The palice spote separated separately
Sale suspert​

Answer 1

Answer:

I'm inclined to suspect that this may not be the most efficient way to convert to space-separated words, if I call it in a tight loop, or 1000's of times. Are there more efficient ways to do this in Swift?

[Edit 1:] The solution I require should remain general for Unicode scalars, not specific to Roman ASCII "A..Z".

[Edit 2:] The solution should also skip the first letter, i.e. not prepend a space before the first letter.

[Edit 3:] Updated for Swift 4 syntax, and added caching of uppercaseLetters, which improves performance in very long strings and tight loops.