Reverting to new X<>() notation rather than [] or {}

Author: chalin

Chapter_06/lib/service/query_service.dart

@@ -23,7 +23,7 @@ class QueryService {
   Future _loadRecipes() {
     return _http.get(_recipesUrl)
       .then((HttpResponse response) {
-        _recipesCache = <String, Recipe>{};
+        _recipesCache = new Map<String, Recipe>();
         for (Map recipe in response.data) {
           Recipe r = new Recipe.fromJson(recipe);
           _recipesCache[r.id] = r;
@@ -34,7 +34,7 @@ class QueryService {
   Future _loadCategories() {
     return _http.get(_categoriesUrl)
         .then((HttpResponse response) {
-          _categoriesCache = <String>[];
+          _categoriesCache = new List<String>();
           for (String category in response.data) {
             _categoriesCache.add(category);
           }

Chapter_07/lib/service/query_service.dart

@@ -23,7 +23,7 @@ class QueryService {
   Future _loadRecipes() {
     return _http.get(_recipesUrl)
       .then((HttpResponse response) {
-        _recipesCache = <String, Recipe>{};
+        _recipesCache = new Map<String, Recipe>();
         for (Map recipe in response.data) {
           Recipe r = new Recipe.fromJson(recipe);
           _recipesCache[r.id] = r;
@@ -34,7 +34,7 @@ class QueryService {
   Future _loadCategories() {
     return _http.get(_categoriesUrl)
         .then((HttpResponse response) {
-          _categoriesCache = <String>[];
+          _categoriesCache = new List<String>();
           for (String category in response.data) {
             _categoriesCache.add(category);
           }