func findCommonPrefix()

in Sources/SwiftBuffet/Utilities.swift [78:91]

• 14 lines of code
• 4 McCabe index (conditional complexity)

func findCommonPrefix(in strings: [String]) -> String? {
    guard var prefix = strings.first else {
        return nil
    }
    for string in strings {
        while !string.hasPrefix(prefix) {
            prefix = String(prefix.dropLast())
            if prefix.isEmpty {
                return nil
            }
        }
    }
    return prefix
}