From e1d70a7c3b57f86c480dc39f0a4fd0d51bfda08a Mon Sep 17 00:00:00 2001
From: msg <mats.gravem@no.experis.com>
Date: Thu, 11 Jan 2024 13:21:06 +0100
Subject: [PATCH] Core 9/9

---
 .../java/com/booleanuk/core/Exercise.java     | 36 +++++++++++--------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/src/main/java/com/booleanuk/core/Exercise.java b/src/main/java/com/booleanuk/core/Exercise.java
index d31a45c..10f988f 100644
--- a/src/main/java/com/booleanuk/core/Exercise.java
+++ b/src/main/java/com/booleanuk/core/Exercise.java
@@ -17,7 +17,7 @@ public class Exercise extends ExerciseBase {
     /*
         Take some time to read and understand the method below.
         - It creates an instance of an ArrayList that will contain Integer types
-            We define the data type that will be stored in a list using angled brackets:
+                We define the data type that will be stored in a list using angled brackets:
             ArrayList<Datatype>
             We can store any data type in a list, even our own custom classes.
             ArrayList<String>
@@ -43,8 +43,9 @@ public ArrayList<Integer> getFavouriteNumbers() {
         TODO: 1. Create a method named getSecondNumber that returns a whole number. It must return the
            second number contained in the list that is returned from getFavouriteNumbers
      */
-
-
+    public int getSecondNumber() {
+        return getFavouriteNumbers().get(1);
+    }
 
     /*
         TODO: 2. Create a method named multiply that accepts two parameters in this order:
@@ -55,16 +56,19 @@ public ArrayList<Integer> getFavouriteNumbers() {
          Use the ArrayList's replaceAll method to iterate through the ArrayList and replace each value with its double
          https://www.programiz.com/java-programming/library/arraylist/replaceall
      */
-
-
+    public ArrayList<Integer> multiply(ArrayList<Integer> list, int num) {
+        list.replaceAll(e -> e * num);
+        return list;
+    }
 
     /*
         TODO: 3. Create a method named isEmpty that accepts one parameter:
          - A list of strings
          The method must return a boolean that indicates whether the provided list is empty or not
      */
-
-
+    public boolean isEmpty(ArrayList<String> list) {
+        return list.isEmpty();
+    }
 
     /*
         TODO: 4. Create a method named addIngredient that accepts two parameters in this order:
@@ -72,8 +76,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          The method must add the second parameter into the list provided and then return the list
      */
-
-
+    public ArrayList<String> addIngredient(ArrayList<String> list, String string) {
+        list.add(string);
+        return list;
+    }
 
     /*
         TODO: 5. Create a method named removeIngredient that accepts two parameters in this order:
@@ -81,8 +87,10 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          The method must remove the second parameter from the list and then return the list
      */
-
-
+    public ArrayList<String> removeIngredient(ArrayList<String> list, String string) {
+        list.remove(1);
+        return list;
+    }
 
     /*
         TODO: 6. Create a method named containsIngredient that accepts two parameters in this order:
@@ -90,7 +98,7 @@ public ArrayList<Integer> getFavouriteNumbers() {
          - A string
          The method must return a boolean that indicates whether the second parameter exists in the provided list
      */
-
-
-
+    public boolean containsIngredient(ArrayList<String> list, String string) {
+        return list.contains(string);
+    }
 }