June 2018 Update

Task/Look-and-say-sequence/Ceylon/look-and-say-sequence.ceylon

@@ -0,0 +1,28 @@
+shared void run() {
+	
+    function lookAndSay(Integer|String input) {
+
+        variable value digits = if (is Integer input) then input.string else input;
+        value builder = StringBuilder();
+
+        while (exists currentChar = digits.first) {
+            if (exists index = digits.firstIndexWhere((char) => char != currentChar)) {
+                digits = digits[index...];
+                builder.append("``index````currentChar``");
+            }
+            else {
+                builder.append("``digits.size````currentChar``");
+                break;
+            }
+        }
+
+        return builder.string;
+    }
+
+    variable String|Integer result = 1;
+    print(result);
+    for (i in 1..14) {
+        result = lookAndSay(result);
+        print(result);
+    }
+}