feat: Lesson12 Resubmission #318
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…the checkoutsByGuestEmail map
…the new keyword and how it creates the new objects.see: new CSVReader(new FileReader(new ClassPathResource
anthonydmays
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Mar 28, 2024
lesson_12/io/io_app/src/main/java/com/codedifferently/lesson12/models/LibraryGuestModel.java
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| @@ -85,12 +85,21 @@ private void populateGuestsWithCheckouts(String filePath, List<LibraryGuestModel | |||
| // Map<String, List<CheckoutModel>> checkoutsByGuestEmail = new HashMap<>(); starts a new hashmap (a hashmap is data strcuture used to store data as a key value pair.) | |||
| // The difference between a hashmap and a map is that a hashmap is less flexible and uses a hashtable for fast access)( a hashtable is a collection of key-value pairs, for each value you have a unique key for it) | |||
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HashMap is just an implementation of the Map interface. There are other implementations of the interface available in Java including the LinkedHashMap implementation.
https://docs.oracle.com/javase/8/docs/api/java/util/LinkedHashMap.html
...2/io/io_app/src/main/java/com/codedifferently/lesson12/factory/javyenware/CsvDataLoader.java
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