Created
May 24, 2018 14:49
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| func isUnique(string: String) -> Bool { | |
| var charSet = Set<Character>() | |
| for character in string { | |
| guard charSet.contains(character) == false else { return false } | |
| charSet.insert(character) | |
| } | |
| return true | |
| } | |
| // if charSet.contains(character) { | |
| // return false | |
| // } else { | |
| // charSet.insert(character) | |
| // } | |
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