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October 18, 2017 04:45
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String extension that adds a method to insert a string in the middle of it.
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| extension String { | |
| func insert(_ string: String, at index: Int) -> String { | |
| let prefix = String(characters.prefix(index)) | |
| let suffix = String(characters.suffix(characters.count - index)) | |
| return prefix + string + suffix | |
| } | |
| } |
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This is no longer useful now that Swift 4 improved string handling, in particular
insert(contentsOf:at:).