Quiz Completed

src/main/java/rocks/zipcode/quiz4/arrays/ArrayUtils.java

@@ -1,22 +1,32 @@
 package rocks.zipcode.quiz4.arrays;
 
+import java.util.Arrays;
+
 /**
  * @author leon on 01/01/2019.
  */
 public class ArrayUtils {
     public static String getMiddleElement(String[] values) {
-        return null;
+
+        return values[values.length / 2];
     }
 
     public static String[] removeMiddleElement(String[] values) {
-        return null;
+        String[] arr = new String[values.length - 1];
+        for (int i = 0; i < values.length / 2; i++) {
+            arr[i] = values[i];
+        }
+        for (int i = values.length / 2; i < arr.length; i++) {
+            arr[i] = values[i + 1];
+        }
+        return arr;
     }
 
     public static String getLastElement(String[] values) {
-        return null;
+        return values[values.length-1];
     }
 
     public static String[] removeLastElement(String[] values) {
-        return null;
+        return values = Arrays.copyOfRange(values, 0,values.length-1);
     }
 }

src/main/java/rocks/zipcode/quiz4/collections/WordCounter.java

@@ -1,12 +1,23 @@
 package rocks.zipcode.quiz4.collections;
 
+import java.util.HashMap;
 import java.util.Map;
 
 public class WordCounter {
+    Map<String, Integer>wordCount = new HashMap<String, Integer>();
     public WordCounter(String... strings) {
-    }
 
+
+        for (String word : strings) {
+            if (!wordCount.containsKey(word)) {
+                wordCount.put(word, 1);
+            } else {
+                int count = wordCount.get(word);
+                wordCount.put(word, count + 1);
+            }
+        }
+    }
     public Map<String, Integer> getWordCountMap() {
-        return null;
+        return wordCount;
     }
 }

src/main/java/rocks/zipcode/quiz4/collections/culonary/Curry.java

@@ -1,4 +1,10 @@
 package rocks.zipcode.quiz4.collections.culonary;
 
-public class Curry {
+public class Curry implements Spice {
+    private String curry = "curry";
+
+    @Override
+    public String getName(){
+        return curry;
+    }
 }

src/main/java/rocks/zipcode/quiz4/collections/culonary/Food.java

@@ -1,20 +1,39 @@
 package rocks.zipcode.quiz4.collections.culonary;
 
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 /**
  * @author leon on 27/12/2018.
  */
 public class Food {
+    private List<Spice> spiceList;
+    private Map<Class<? extends Spice>, Integer> spiceMap;
+
+public Food(){
+    this.spiceList = new ArrayList<>();
+    this.spiceMap = new HashMap<>();
+}
+
     public List<Spice> getAllSpices() {
-        return null;
+        return spiceList;
     }
 
-    public <SpiceType extends Class<? extends Spice>> Map<SpiceType, Integer> getSpiceCount() {
-        return null;
+
+    public Map<Class<? extends Spice>, Integer> getSpiceCount() {
+
+        return spiceMap;
     }
 
     public void applySpice(Spice spice) {
+    if (!spiceMap.containsKey(spice.getClass())){
+        spiceMap.put(spice.getClass(), 1);
+    }else {
+        int numOfSpice = spiceMap.get(spice.getClass());
+        spiceMap.put(spice.getClass(), numOfSpice + 1);
+    }
+    spiceList.add(spice);
     }
 }

src/main/java/rocks/zipcode/quiz4/collections/culonary/Ginger.java

@@ -3,5 +3,11 @@
 /**
  * @author leon on 27/12/2018.
  */
-public class Ginger {
+public class Ginger implements Spice {
+    private String ginger = "ginger";
+
+    @Override
+    public String getName() {
+        return ginger;
+    }
 }

src/main/java/rocks/zipcode/quiz4/collections/culonary/Pepper.java

@@ -3,5 +3,10 @@
 /**
  * @author leon on 27/12/2018.
  */
-public class Pepper {
+public class Pepper implements Spice {
+    private String pepper = "pepper";
+    @Override
+    public String getName() {
+        return pepper;
+    }
 }

src/main/java/rocks/zipcode/quiz4/collections/culonary/Spice.java

@@ -4,4 +4,5 @@
  * @author leon on 27/12/2018.
  */
 public interface Spice {
+    String getName();
 }

src/main/java/rocks/zipcode/quiz4/fundamentals/Calculator.java

@@ -1,35 +1,48 @@
 package rocks.zipcode.quiz4.fundamentals;
 
+import static java.lang.Math.sqrt;
+
 /**
  * @author leon on 21/12/2018.
  */
 public class Calculator {
     public static Double squareRoot(Double value) {
-        return null;
+        return sqrt(value);
     }
 
     public static Double square(Double value) {
-        return null;
+        return value * value;
     }
 
     public static Double[] squareRoots(Double... value) {
-        return null;
+
+        Double[] result = new Double[value.length];
+        for (int i = 0; i < value.length ; i++)
+        result[i] = Math.sqrt(value[i]);
+
+        return result;
     }
 
     public static Double[] squares(Double... values) {
-        return null;
+
+        Double[] result = new Double[values.length];
+
+        for (int i = 0; i < values.length ; i++)
+            result[i] = Math.pow(values[i], 2);
+        return result;
     }
 
     public static Double add(Double value1, Double value2) {
-        return null;
+        return value1 + value2;
     }
 
     public static Double subtract(Double value1, Double value2) {
-        return null;
+        return value1 - value2;
     }
 
 
     public static Double divide(Double divisor, Double dividend) {
-        return null;
+
+        return divisor / dividend;
     }
 }

src/main/java/rocks/zipcode/quiz4/fundamentals/StringUtils.java

@@ -1,34 +1,67 @@
 package rocks.zipcode.quiz4.fundamentals;
 
+import java.util.Arrays;
+import java.util.HashMap;
+
 /**
  * @author leon on 21/12/2018.
  */
 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;
+            char[] arr = str.toCharArray();
+            int middle = arr.length/2;
+            arr[middle] = Character.toUpperCase(arr[middle]);
+            String result = new String(arr);
+        return result;
     }
 
     public static String lowerCaseMiddleCharacter(String str) {
-        return null;
+        char[] arr = str.toCharArray();
+        int middle = arr.length/2;
+        arr[middle] = Character.toLowerCase(arr[middle]);
+        String result = new String(arr);
+
+        return result;
     }
 
     public static Boolean isIsogram(String str) {
-        return null;
-    }
+        // Convert the string in lower case letters
+        //str = str.toLowerCase();
+        int len = str.length();
+        char arr[] = str.toCharArray();
 
+        Arrays.sort(arr);
+        for (int i = 0; i < len - 1; i++) {
+            if (arr[i] == arr[i + 1])
+                return false;
+        }
+        return true;
+    }
     public static Boolean hasDuplicateConsecutiveCharacters(String str) {
-        return null;
+        return (str.matches(".*(.)\\1.*"));
     }
-
     public static String removeConsecutiveDuplicateCharacters(String str) {
-        return null;
+
+        //return str.replaceAll("(.+?)\\1+", "");
+        //return str.replaceAll("([a-zA-Z])\\1\\1+", "$1$1$1");
+        //return str.replaceAll("((.)\\2{2})\\2+","$1$1");
+        return str.replaceAll("(.)(\\1)","");
     }
 
     public static String invertCasing(String str) {
-        return null;
+        StringBuilder result = new StringBuilder(str.length());
+        for (char c : str.toCharArray()) {
+            if (Character.isUpperCase(c)) {
+                c = Character.toLowerCase(c);
+            } else if (Character.isLowerCase(c)) {
+            c = Character.toUpperCase(c);
+        }
+        result.append(c);
+    }
+        return result.toString();
     }
 }

src/main/java/rocks/zipcode/quiz4/objectorientation/account/Account.java

@@ -3,11 +3,15 @@
 /**
  * @author leon on 30/12/2018.
  */
-public class Account extends BankAccount {
+public class Account {
+    private  Long id;
+    public Account(){}
     public Long getId() {
-        return null;
+
+        return this.id;
     }
 
     public void setId(Long id) {
+        this.id = id;
     }
 }

src/main/java/rocks/zipcode/quiz4/objectorientation/account/Bank.java

@@ -1,17 +1,29 @@
 package rocks.zipcode.quiz4.objectorientation.account;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * @author leon on 27/12/2018.
  */
 public class Bank {
+         private List<BankAccount> accounts;
+
+    public Bank() {
+        this.accounts = new ArrayList<>();
+    }
     public BankAccount removeBankAccountByIndex(Integer indexNumber) {
-        return null;
+        BankAccount newAccount = accounts.get(indexNumber);
+    this.accounts.remove((int) indexNumber);
+        return newAccount;
     }
 
     public void addBankAccount(BankAccount bankAccount) {
+        this.accounts.add(bankAccount);
     }
 
     public Boolean containsBankAccount(BankAccount bankAccount) {
-        throw new UnsupportedOperationException("Method not yet implemented");
+       return accounts.contains(bankAccount);
+       // throw new UnsupportedOperationException("Method not yet implemented");
     }
 }

src/main/java/rocks/zipcode/quiz4/objectorientation/account/BankAccount.java

@@ -3,7 +3,32 @@
 /**
  * @author leon on 27/12/2018.
  */
-public class BankAccount {
+public class BankAccount extends Account implements Transactable {
+        private  double balance;
+
     public void setBalance(Double val) {
+        this.balance = val;
+    }
+
+    @Override
+    public void deposit(Double amountToIncreaseBy) throws IllegalArgumentException {
+      if (amountToIncreaseBy < 0) {
+          throw new IllegalArgumentException();
+      }
+        balance += amountToIncreaseBy;
+    }
+
+    @Override
+    public void withdrawal(Double amountToDecreaseBy) throws IllegalArgumentException {
+        if(balance < amountToDecreaseBy || amountToDecreaseBy < 0){
+            throw new IllegalArgumentException();
+        }
+        balance -= amountToDecreaseBy;
+    }
+
+    @Override
+    public Double getBalance() {
+        return balance;
     }
+
 }