squareArray and TicTacToe complete

src/main/java/rocks/zipcode/io/quiz3/arrays/SquareArrayAnalyzer.java

@@ -1,10 +1,17 @@
 package rocks.zipcode.io.quiz3.arrays;
 
+import java.util.Arrays;
+
 /**
  * @author leon on 09/12/2018.
  */
 public class SquareArrayAnalyzer {
     public static Boolean compare(Integer[] input, Integer[] squaredValues) {
-        return null;
+        if (input.length != squaredValues.length) return false;
+        Arrays.sort(input); Arrays.sort(squaredValues);
+        for (int i=0; i<input.length; i++)
+            if ((input[i]*input[i]) != squaredValues[i])
+                return false;
+        return true;
     }
 }

src/main/java/rocks/zipcode/io/quiz3/arrays/TicTacToe.java

@@ -5,26 +5,66 @@ package rocks.zipcode.io.quiz3.arrays;
  */
 public class TicTacToe {
 
+    String[][] board;
+
     public TicTacToe(String[][] board) {
+        this.board = board;
     }
 
     public String[] getRow(Integer value) {
-        return null;
+        return board[value];
     }
 
     public String[] getColumn(Integer value) {
-        return null;
+        String[] column = new String[board.length];
+        for (int i=0; i<board.length; i++)
+            column[i] = board[i][value];
+        return column;
     }
 
     public Boolean isRowHomogenous(Integer rowIndex) {
-        return null;
+        return isHomogenous(getRow(rowIndex));
     }
 
     public Boolean isColumnHomogeneous(Integer columnIndex) {
-        return null;
+        return isHomogenous(getColumn(columnIndex));
     }
 
     public String getWinner() {
+        for (int i=0; i<board.length; i++) {
+            if (isRowHomogenous(i)) return getRow(i)[0];
+            else if (isColumnHomogeneous(i)) return getColumn(i)[0];
+        }
+
+        if (isHomogenous(backDiagonal())) return backDiagonal()[0];
+        else if (isHomogenous(forwardDiagonal())) return forwardDiagonal()[0];
         return null;
     }
+
+    //the diagonal line in the form of back slash
+    private String[] backDiagonal(){
+        String[] diag = new String[board.length];
+        for (int i=0; i<board.length; i++)
+            diag[i] = board[i][i];
+        return diag;
+    }
+
+    //the diagonal line in the form of forward slash
+    private String[] forwardDiagonal(){
+        String[] diag = new String[board.length];
+        int j = board.length - 1;
+        for (int i=0; i<board.length; i++) {
+            diag[i] = board[i][j];
+            j--;
+        }
+        return diag;
+    }
+
+    //one stop shop for homogoneity
+    private Boolean isHomogenous(String[] line){
+        for (int i=1; i<board.length; i++)
+            if (!line[i].equals(line[i-1]))
+                return false;
+        return true;
+    }
 }