Data update

Task/Find-common-directory-path/Swift/find-common-directory-path-2.swift

@@ -0,0 +1,28 @@
+import Foundation
+
+func commonPrefix<T: Equatable>(_ lhs: [T], _ rhs: [T]) -> [T] {
+	for tryLen in (0...min(lhs.count,rhs.count)).reversed() {
+		if lhs.starts(with: rhs.prefix(tryLen)) {
+			return Array<T>(rhs.prefix(tryLen))
+		}
+	}
+	return []
+}
+
+var test = ["/home/user1/tmp/coverage/test",
+		    "/home/user1/tmp/covert/operator",
+		    "/home/user1/tmp/coven/members"]
+
+let lcp: String = test.reduce("") { lhs, rhs in
+	if !lhs.isEmpty {
+		var commonSoFar = commonPrefix(
+			lhs.components(separatedBy: "/"),
+			rhs.components(separatedBy: "/")
+		)
+		return commonSoFar.joined(separator: "/")
+	}
+	return rhs
+}
+print("Longest common path: \(lcp)")
+
+// Longest common path: /home/user1/tmp