Swift replace substring regex

Question

I am attempting to use regular expression to replace all occurrences of UK car registrations within a string.

The following swift code works perfectly for a when the

Answer 1

Warning

Do not use NSRange(location: 0, length: myString.count) as all examples above quoted.

Use NSRange(myString.startIndex..., in: myString) instead!

.count will count newline characters like \r\n as one character - this may result in a shortened, thus invalid, NSRange that does not match the whole string.

(.length should work)