fix: resolves issue with CatalogSearcher

Signed-off-by: Anthony D. Mays <[email protected]>

Author: anthonydmays

lesson_26/api/javascript/api_app/src/library/library.service.ts

@@ -18,7 +18,7 @@ export class LibraryService {
 
   constructor(id: string) {
     this.id = id;
-    this.searcher = new CatalogSearcher(this.itemsById.values());
+    this.searcher = new CatalogSearcher(this.itemsById);
   }
 
   getId(): string {

lesson_26/api/javascript/api_app/src/library/search/catalog_searcher.ts

@@ -2,13 +2,13 @@ import { SearchCriteria } from './search_criteria';
 import { Searchable } from './searchable';
 
 export class CatalogSearcher<T extends Searchable> {
-  private catalog: Iterable<T>;
+  private catalog: ReadonlyMap<string, T>;
 
-  constructor(catalog: Iterable<T>) {
+  constructor(catalog: ReadonlyMap<string, T>) {
     this.catalog = catalog;
   }
 
   search(query: SearchCriteria): T[] {
-    return [...this.catalog].filter((item) => item.matches(query));
+    return [...this.catalog.values()].filter((item) => item.matches(query));
   }
 }