in between commit

lib/util/Months.dart

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+class Months {
+  static final Month january = new Month("january", 0, 0);
+  static final Month february = new Month("february", 1, 3);
+  static final Month march = new Month("march", 2, 3);
+  static final Month april = new Month("april", 3, 6);
+  static final Month may = new Month("may", 4, 1);
+  static final Month june = new Month("june", 5, 4);
+  static final Month july = new Month("july", 6, 6);
+  static final Month august = new Month("august", 7, 2);
+  static final Month september = new Month("september", 8, 5);
+  static final Month october = new Month("october", 9, 0);
+  static final Month november = new Month("november", 10, 3);
+  static final Month december = new Month("december", 11, 5);
+
+  static final List<Month> _list = List.unmodifiable([
+    january,
+    february,
+    march,
+    april,
+    may,
+    june,
+    july,
+    august,
+    september,
+    october,
+    november,
+    december
+  ]);
+  static final Map<String, Month> _map = Map.unmodifiable({
+    january.string: january,
+    february.string: february,
+    march.string: march,
+    april.string: april,
+    may.string: may,
+    june.string: june,
+    july.string: july,
+    august.string: august,
+    september.string: september,
+    october.string: october,
+    november.string: november,
+    december.string: december
+  });
+
+  static List<String> _stringList = List.unmodifiable(
+    _list.map((month) => month.string)
+  );
+  static List<int> _indexList = List.unmodifiable(
+    _list.map((month) => month.i)
+  );
+  static List<int> _valueList = List.unmodifiable(
+      _list.map((month) => month.value)
+  );
+  static List<Month> asList(){
+    return _list;
+  }
+  static List<String> asStringList(){
+    return _stringList;
+  }
+  static List<int> asIndexList(){
+    return _indexList;
+  }
+  static List<int> asValueList(){
+    return _valueList;
+  }
+  static Month getFromString(String month){
+    return _map[month.toLowerCase()];
+  }
+}
+
+class Month {
+  final String string;
+  final int i;
+  final int value;
+  Month(this.string, this.i, this.value);
+  
+  @override
+  String toString() {
+    return this.string;
+  }
+  @override
+  bool operator == (Object other){
+    return other is Month &&
+      this.string == other.string &&
+      this.i == other.i &&
+      this.value == other.value;
+  }
+}