What characters are in whitespaceAndNewlineCharacterSet()?

Question

I\'m parsing some nasty files - you know, mix comma, space and tab delimiters in a single line, and then run it through a text editor that word wraps at column 65 with

Answer 1

NSCharacterSet is an opaque class that does not expose its content easily. You have to see it more as a "membership" rule service than a list of characters.

This may be a somewhat brutal approach, but you can get the list of members in an NSCharacterSet by going through all 16 bit scalar values and checking for membership in the set:

 let charSet = NSCharacterSet.whitespaceAndNewlineCharacterSet()
 for i in 0..<65536
 {
    let u:UInt16 = UInt16(i)
    if charSet.characterIsMember(u)
    { print("\(u): \(Character(UnicodeScalar(u)))") }
 }

This gives surprising results for non-displayable character sets but it can probably answer your question.