Video Tutorial: NSString

Challenge

Your challenge is to write some code that generates Elmo’s song [video] [lyrics], given an arbitrary list of pipe-separated names, like this:

NSString *namesList = @"Elmo|Big Bird|Snuffy";
NSMutableString *finalSong = [NSMutableString string];
// Your code here!
NSLog(@"%@", finalSong);

Hints:

• You will probably need to use appendString:, appendFormat:, and componentsSeparatedByString: to accomplish this.
• Notice there are is a slight variance between verses – the first time it’s “He loves to sing”, the rest is “I love to sing.”
• Notice the ending also varies depending on whether it’s the first, middle, or final person.

Download demo code

Download challenge solution

Helpful links

• Wikipedia: UTF8 (nice explanation of how it works)
• Unicode character reference for the glyph “E” from “English” (0x45)
• Unicode character reference for the glyph “日” from “日本語” (0x304A)
• Unicode character reference for the glyph G clef
• An alternative Unicode character reference
• StackOverflow: NSString vs NSMutableString
• StackOverflow: UTF8 vs UTF16 vs UTF32
• Apple’s NSString documentation
• Apple’s NSString programming guide