Getting there

src/main/java/rocks/zipcode/io/quiz4/collections/SimpleStringGroup.java

@@ -1,7 +1,9 @@
 package rocks.zipcode.io.quiz4.collections;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Iterator;
+import java.util.List;
 
 /**
  * @author leon on 11/12/2018.
@@ -18,6 +20,7 @@ public class SimpleStringGroup implements Iterable, Collection {
         this.indexOfValue = indexOfValue;
     }
 
+    List<String> list = new ArrayList<>();
     SimpleStringGroup group = new SimpleStringGroup();
 
     public SimpleStringGroup() {
@@ -29,23 +32,23 @@ public class SimpleStringGroup implements Iterable, Collection {
     }
 
     public void insert(String string) {
-        this.string = string;
+        list.add(string);
     }
 
     public Boolean has(String valueToInsert) {
-       if(group.contains(valueToInsert)){
+       if(list.contains(valueToInsert)){
             return true;
         }
         return false;
     }
 
     public String fetch(int indexOfValue) {
-      return String.valueOf(group.contains(indexOfValue));
+      return String.valueOf(list.contains(indexOfValue));
 
     }
 
     public void delete(String valueToInsert) {
-        this.valueToInsert = valueToInsert;
+        group.delete(valueToInsert);
     }
 
     @Override
@@ -55,12 +58,13 @@ public class SimpleStringGroup implements Iterable, Collection {
 
     @Override
     public boolean isEmpty() {
-        return true;
+
+      return list.isEmpty();
     }
 
     @Override
     public boolean contains(Object o) {
-        if(string.equals(o)){
+        if(list.equals(o)){
             return true;
         }
         return false;
@@ -74,7 +78,7 @@ public class SimpleStringGroup implements Iterable, Collection {
     @Override
     public boolean add(Object o) {
 
-        return group.add(o);
+        return true;
     }
 
     @Override

src/main/java/rocks/zipcode/io/quiz4/collections/ZipCodeWilmington.java

@@ -25,6 +25,7 @@ public class ZipCodeWilmington {
 //        this.numberOfHours = numberOfHours;
 //        double numOfHrsPerLearner = numberOfHours/student.length;
 //
+//        Student[] students;
 //        for(Student student : students){
 //            student.learn(numOfHrsPerLearner);
 //        }

src/main/java/rocks/zipcode/io/quiz4/generics/GenericUtils.java

@@ -22,7 +22,7 @@ public class GenericUtils {
     }
 
     public static Set<? extends Comparable> getOriginalSet() {
-        if(powerSet().equals(originalSet)){
+        if(!powerSet().equals(originalSet)) {
         }
 
         return originalSet;

src/main/java/rocks/zipcode/io/quiz4/generics/Group.java

@@ -1,19 +1,22 @@
 package rocks.zipcode.io.quiz4.generics;
 
-import java.util.*;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
 
 /**
  * @author leon on 18/12/2018.
  */
 public class Group<_>{
 
-    List<_> list = new ArrayList<>();
+  List<_> list = new ArrayList<>();
 
 //    private int indexOfValue;
 //    private _ value;
 
     public Group(){
-        throw new UnsupportedOperationException("Method not yet implemented");
+        //throw new UnsupportedOperationException("Method not yet implemented");
     }
 
     public Integer count(){

src/main/java/rocks/zipcode/io/quiz4/generics/MyStack.java

@@ -8,13 +8,13 @@ import java.util.Stack;
  * @author leon on 11/12/2018.
  */
 public class MyStack<SomeType> implements Iterable {
-    Stack<SomeType> stack= new Stack <>();
+    Stack<SomeType> stack = new Stack<>();
 
-    private SomeType i;
+//    private SomeType i;
 
     public MyStack() {
 
-        throw new UnsupportedOperationException("Method not yet implemented");
+//        throw new UnsupportedOperationException("Method not yet implemented");
     }
 
     public Boolean isEmpty() {