Finish day 2

lib/day2/command.dart

@@ -1,4 +1,3 @@
-import "dart:convert";
 import "dart:io";
 
 import "package:args/command_runner.dart";
@@ -34,7 +33,10 @@ class Day2Command extends Command {
 
     var inputFile = File(filePath);
     var openFile = await inputFile.readAsString();
-    var part1Answer = openFile
+
+    RegExp exp = RegExp(r'^([0-9]+)\1+$');
+
+    var ids = openFile
         .trim()
         .split(',')
         .expand((range) {
@@ -49,15 +51,26 @@ class Day2Command extends Command {
               List.generate(to - from + 1, (i) => i + from);
           return createRange(numRange[0], numRange[1]);
         })
-        .map((id) => id.toString())
+        .map((id) => id.toString());
+
+    var part1Answer = ids
         .where((id) => id.length.isEven)
         .where((id) {
-          var first_half = id.substring(0, (id.length / 2).floor());
-          var second_half = id.substring((id.length / 2).floor(), id.length);
-          return first_half == second_half;
+          var firstHalf = id.substring(0, (id.length / 2).floor());
+          var secondHalf = id.substring((id.length / 2).floor(), id.length);
+          return firstHalf == secondHalf;
         })
         .map((id) => int.parse(id))
         .reduce((id1, id2) => id1 + id2);
     print("Part 1 Answer: $part1Answer");
+
+    var part2Answer = ids
+        .where((id) => exp.hasMatch(id))
+        .map((id) {
+          //print(id);
+          return int.parse(id);
+        })
+        .reduce((id1, id2) => id1 + id2);
+    print("Part 2 Answer: $part2Answer");
   }
 }