Curtis Cook's Quiz 5

src/main/java/rocks/zipcode/quiz5/collections/Bank.java

@@ -12,8 +12,9 @@ public class Bank {
     List<BankAccount> bankAccountList = new ArrayList<>();
 
     public BankAccount removeBankAccountByIndex(Integer indexNumber) {
-        bankAccountList.remove(indexNumber);
-        return bankAccountList.get(indexNumber);
+        BankAccount removedBankAccount = bankAccountList.get(indexNumber);
+        bankAccountList.remove(removedBankAccount);
+        return removedBankAccount;
     }
 
     public void addBankAccount(BankAccount bankAccount) {

src/main/java/rocks/zipcode/quiz5/collections/Food.java

@@ -2,6 +2,8 @@ package rocks.zipcode.quiz5.collections;
 
 import rocks.zipcode.quiz5.objectorientation.Spice;
 
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -9,14 +11,25 @@ import java.util.Map;
  * @author leon on 27/12/2018.
  */
 public class Food {
+    List<Spice> spices = new ArrayList<>();
+
     public List<Spice> getAllSpices() {
-        return null;
+        return spices;
     }
 
     public <SpiceType extends Class<? extends Spice>> Map<SpiceType, Integer> getSpiceCount() {
-        return null;
+        Map<SpiceType, Integer> hashMap = new HashMap<>();
+        for (Spice spice : spices) {
+            if (!hashMap.containsKey(spice.getClass())) {
+                hashMap.put((SpiceType) spice.getClass(), 1);
+            } else {
+                hashMap.put((SpiceType) spice.getClass(), hashMap.get(spice.getClass()) + 1);
+            }
+        }
+        return hashMap;
     }
 
     public void applySpice(Spice spice) {
+        spices.add(spice);
     }
 }

src/main/java/rocks/zipcode/quiz5/collections/WordCounter.java

@@ -1,12 +1,27 @@
 package rocks.zipcode.quiz5.collections;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 public class WordCounter {
+    List<String> words = new ArrayList<>();
+
     public WordCounter(String... strings) {
+        words.addAll(Arrays.asList(strings));
     }
 
     public Map<String, Integer> getWordCountMap() {
-        return null;
+        Map<String, Integer> map = new HashMap<>();
+        for (String word : words) {
+            if (!map.containsKey(word)) {
+                map.put(word, 1);
+            } else {
+                map.put(word, map.get(word) + 1);
+            }
+        }
+        return map;
     }
 }

src/main/java/rocks/zipcode/quiz5/fundamentals/Calculator.java

@@ -1,35 +1,43 @@
 package rocks.zipcode.quiz5.fundamentals;
 
+
 /**
  * @author leon on 21/12/2018.
  */
 public class Calculator {
     public static Double squareRoot(Double value) {
-        return null;
+        return Math.sqrt(value);
     }
 
     public static Double square(Double value) {
-        return null;
+        return value * value;
     }
 
     public static Double[] squareRoots(Double... value) {
-        return null;
+        Double[] squareRoots = new Double[value.length];
+        for (int i = 0; i < value.length; i++) {
+            squareRoots[i] = Calculator.squareRoot(value[i]);
+        }
+        return squareRoots;
     }
 
     public static Double[] squares(Double... values) {
-        return null;
+        Double[] squares = new Double[values.length];
+        for (int i = 0; i < values.length; i++) {
+            squares[i] = Calculator.square(values[i]);
+        }
+        return squares;
     }
 
     public static Double add(Double value1, Double value2) {
-        return null;
+        return Double.valueOf(String.format("%.2f", value1 + value2));
     }
 
     public static Double subtract(Double value1, Double value2) {
-        return null;
+        return Double.valueOf(String.format("%.1f", value1 - value2));
     }
 
-
     public static Double divide(Double divisor, Double dividend) {
-        return null;
+        return Double.valueOf(String.format("%.1f", divisor / dividend));
     }
 }

src/main/java/rocks/zipcode/quiz5/fundamentals/StringUtils.java

@@ -5,11 +5,16 @@ package rocks.zipcode.quiz5.fundamentals;
  */
 public class StringUtils {
     public static Character getMiddleCharacter(String string) {
-        return null;
+        return string.charAt(string.length()/2);
     }
 
     public static String capitalizeMiddleCharacter(String str) {
-        return null;
+        StringBuilder sb = new StringBuilder(str);
+        int index = str.length() / 2;
+        Character middleChar = Character.toUpperCase(StringUtils.getMiddleCharacter(str));
+        sb.deleteCharAt(index);
+        sb.insert(index, middleChar);
+        return sb.toString();
     }
 
     public static String lowerCaseMiddleCharacter(String str) {

src/main/java/rocks/zipcode/quiz5/objectorientation/Curry.java

@@ -1,4 +1,4 @@
 package rocks.zipcode.quiz5.objectorientation;
 
-public class Curry {
+public class Curry implements Spice {
 }

src/main/java/rocks/zipcode/quiz5/objectorientation/Ginger.java

@@ -3,5 +3,5 @@ package rocks.zipcode.quiz5.objectorientation;
 /**
  * @author leon on 27/12/2018.
  */
-public class Ginger {
+public class Ginger implements Spice {
 }

src/main/java/rocks/zipcode/quiz5/objectorientation/Pepper.java

@@ -3,5 +3,5 @@ package rocks.zipcode.quiz5.objectorientation;
 /**
  * @author leon on 27/12/2018.
  */
-public class Pepper {
+public class Pepper implements Spice {
 }