Comma List Swift
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| extension SequenceType where Generator.Element == String { | |
| func commaList() -> String { | |
| var result = joinWithSeparator(", ") | |
| let range = result.rangeOfString(", ", options: .BackwardsSearch) | |
| result.replaceRange(range!, with: " & ") | |
| return result | |
| } | |
| } | |
| ["1", "2", "3", "4"].commaList() |
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