prefer using spreadng

Author: akirasosa

src/app/components/micropost-list/micropost-list.component.ts

@@ -50,7 +50,7 @@ export class MicropostListComponent implements OnInit {
   private list(maxId: number|null = null): void {
     this.userMicropostService.list(this.userId, {maxId: maxId, count: 5})
       .subscribe(posts => {
-        this.posts = this.posts.concat(posts);
+        this.posts = [...this.posts, ...posts];
         this.noMorePosts = posts.length === 0;
       }, e => this.errorHandler.handle(e))
     ;

src/app/pages/+related-user-list/related-user-list.component.ts

@@ -37,7 +37,7 @@ export abstract class RelatedUserListComponent implements OnInit {
 
   private list(maxId: number|null): void {
     this.listProvider(maxId).subscribe(relatedUsers => {
-      this.relatedUsers = this.relatedUsers.concat(relatedUsers);
+      this.relatedUsers = [...this.relatedUsers, ...relatedUsers];
       this.noMoreUsers = relatedUsers.length === 0;
     }, e => this.errorHandler.handle(e));
   }