Untitled
unknown
swift
3 years ago
743 B
4
Indexable
let inputString = "AAAABBBCCXYZDDDDEEEFFFAAAAAA" var tempResult = "" for temp in inputString { if tempResult.isEmpty { tempResult.append(temp) } else { if (tempResult.last?.description ?? "") == String(temp) { tempResult.append(temp) } else { tempResult.append("_") tempResult.append(temp) } } } let dividedResult = tempResult.components(separatedBy: "_") let result = dividedResult.reduce("") { partialResult, value in var partialResult = partialResult partialResult.append(String(value.first?.description ?? "")) if value.count != 1 { partialResult.append(String(value.count)) } return partialResult } print("result \(result)")
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