September 2017 Update

Task/Roman-numerals-Encode/Kotlin/roman-numerals-encode.kotlin

@@ -19,14 +19,14 @@ fun encode(number: Int): String? {
         return null
     }
     var num = number
-    val buffer = StringBuffer()
-    for ((multiple, numeral) in romanNumerals) {
+    var result = ""
+    for ((multiple, numeral) in romanNumerals.entries) {
         while (num >= multiple) {
             num -= multiple
-            buffer.append(numeral)
+            result += numeral
         }
     }
-    return buffer.toString()
+    return result
 }
 
 fun main(args: Array<String>) {