feat(facade/collection): add StringMap support

Author: tbosch

modules/facade/src/collection.dart

@@ -14,6 +14,17 @@ class MapWrapper {
  static int size(m) {return m.length;}
 }
 
+// TODO: how to export StringMap=Map as a type?
+class StringMapWrapper {
+ static HashMap create() => new HashMap();
+ static get(map, key) {
+ return map[key];
+ }
+ static set(map, key, value) {
+ map[key] = value;
+ }
+}
+
 class ListWrapper {
  static List clone(List l) => new List.from(l);
  static List create() => new List();

modules/facade/src/collection.es6

@@ -13,6 +13,19 @@ export class MapWrapper {
  static size(m) {return m.size;}
 }
 
+// TODO: cannot export StringMap as a type as Dart does not support
+// renaming types...
+export class StringMapWrapper {
+ // Note: We are not using Object.create(null) here due to
+ // performance!
+ static create():Object { return { }; }
+ static get(map, key) {
+ return map.hasOwnProperty(key) ? map[key] : undefined;
+ }
+ static set(map, key, value) {
+ map[key] = value;
+ }
+}
 
 export class ListWrapper {
  static create():List { return new List(); }