Data commit

Task/UTF-8-encode-and-decode/Swift/utf-8-encode-and-decode.swift

@@ -0,0 +1,21 @@
+import Foundation
+
+func encode(_ scalar: UnicodeScalar) -> Data {
+  return Data(String(scalar).utf8)
+}
+
+func decode(_ data: Data) -> UnicodeScalar? {
+  guard let string = String(data: data, encoding: .utf8) else {
+    assertionFailure("Failed to convert data to a valid String")
+    return nil
+  }
+  assert(string.unicodeScalars.count == 1, "Data should contain one scalar!")
+  return string.unicodeScalars.first
+}
+
+for scalar in "AöЖ€𝄞".unicodeScalars {
+  let bytes = encode(scalar)
+  let formattedBytes = bytes.map({ String($0, radix: 16)}).joined(separator: " ")
+  let decoded = decode(bytes)!
+  print("character: \(decoded), code point: U+\(String(scalar.value, radix: 16)), \tutf-8: \(formattedBytes)")
+}