refactor: add leading underscore to private fields

Closes #4001

modules/examples/src/order_management/index.ts

@@ -33,9 +33,9 @@ class OrderItem {
 
 class Order {
   constructor(public orderId: number, public customerName: string, public limit: number,
-              private dataService: DataService) {}
+              private _dataService: DataService) {}
 
-  get items(): OrderItem[] { return this.dataService.itemsFor(this); }
+  get items(): OrderItem[] { return this._dataService.itemsFor(this); }
   get total(): number { return this.items.map(i => i.total).reduce((a, b) => a + b); }
 }
 
@@ -113,8 +113,8 @@ class DataService {
 class OrderListComponent {
   orders: Order[];
 
-  constructor(private service: DataService) { this.orders = service.orders; }
-  select(order: Order): void { this.service.currentOrder = order; }
+  constructor(private _service: DataService) { this.orders = _service.orders; }
+  select(order: Order): void { this._service.currentOrder = order; }
 }
 
 
@@ -182,13 +182,13 @@ class OrderItemComponent {
   directives: [FORM_DIRECTIVES, OrderItemComponent, NgFor, NgIf]
 })
 class OrderDetailsComponent {
-  constructor(private service: DataService) {}
+  constructor(private _service: DataService) {}
 
-  get order(): Order { return this.service.currentOrder; }
+  get order(): Order { return this._service.currentOrder; }
 
-  deleteItem(item: OrderItem): void { this.service.deleteItem(item); }
+  deleteItem(item: OrderItem): void { this._service.deleteItem(item); }
 
-  addItem(): void { this.service.addItemForOrder(this.order); }
+  addItem(): void { this._service.addItemForOrder(this.order); }
 }
 
 @Component({selector: 'order-management-app', viewBindings: [DataService]})

modules/examples/src/person_management/index.ts

@@ -115,8 +115,8 @@ class DataService {
   directives: [FORM_DIRECTIVES]
 })
 class FullNameComponent {
-  constructor(private service: DataService) {}
-  get person(): Person { return this.service.currentPerson; }
+  constructor(private _service: DataService) {}
+  get person(): Person { return this._service.currentPerson; }
 }
 
 @Component({selector: 'person-detail-cmp'})
@@ -163,8 +163,8 @@ class FullNameComponent {
   directives: [FORM_DIRECTIVES, NgIf]
 })
 class PersonsDetailComponent {
-  constructor(private service: DataService) {}
-  get person(): Person { return this.service.currentPerson; }
+  constructor(private _service: DataService) {}
+  get person(): Person { return this._service.currentPerson; }
 }
 
 @Component({selector: 'persons-cmp'})
@@ -186,9 +186,9 @@ class PersonsDetailComponent {
 class PersonsComponent {
   persons: Person[];
 
-  constructor(private service: DataService) { this.persons = service.persons; }
+  constructor(private _service: DataService) { this.persons = _service.persons; }
 
-  select(person: Person): void { this.service.currentPerson = person; }
+  select(person: Person): void { this._service.currentPerson = person; }
 }