Lab Submission

StringArrayUtils.java

@@ -152,23 +152,54 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        String[] sortedArray = array.sort();
-        
-        for(int i = 1; i < sortedArray.length; i++){
-            if(sortedArray[i]!=sortedArray[i-1]){
-                    add to array list
+        int newArrayLength = array.length - countDuplicates(array);
+        String[] newArray = new String[newArrayLength];
+        newArray[0] = array[0];
+        int index = 1;
+        for(int i = 1; i < array.length; i++){
+            if(!array[i].equals((array[i-1]))){
+                newArray[index] = array[i];
+                index += 1;
             }
         }
+        return newArray;
     }
-    return null;
-}
 
-/**
- * @param array array of chars
- * @return array of Strings with each consecutive duplicate occurrence concatenated as a single string in an array of Strings
- */ // TODO
-public static String[] packConsecutiveDuplicates(String[] array) {
-return null;
-}
-
-}
+    public static int countDuplicates(String[] array){
+        int duplicates = 0;
+        for (int i =1; i< array.length; i++){
+            if(array[i].equals(array[i-1])){
+                duplicates++;
+            }
+        }
+        return duplicates;
+    }
+
+    /**
+     * @param array array of chars
+     * @return array of Strings with each consecutive duplicate occurrence concatenated as a single string in an array of Strings
+     */ // TODO
+    public static String[] packConsecutiveDuplicates(String[] array) {
+        int newArrayLength = array.length-countDuplicates(array);
+        String [] newArray = new String [newArrayLength];
+        
+        StringBuilder tempString = new StringBuilder(array[0]);
+        int index = 0;
+        
+        for (int i = 1; i< array.length; i++){
+           
+           if(array[i].equals(array[i-1])){
+               tempString.append(array[i]);
+            }else{
+                newArray[index] = tempString.toString();
+                index++;
+                tempString.delete(0,tempString.length());
+                tempString.append(array[i]);
+            }
+        } 
+        newArray[index] = tempString.toString();
+        return newArray;
+    }
+    
+
+}

StringArrayUtilsTest.java

@@ -1,5 +1,5 @@
  
-
+import java.util.Arrays;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -397,6 +397,7 @@ public class StringArrayUtilsTest {
         String[] array = {"a", "a", "a", "b", "c", "c", "a", "a", "d"};
         String[] expected = {"aaa", "b", "cc", "aa", "d"};
         String[] actual = StringArrayUtils.packConsecutiveDuplicates(array);
+        System.out.print(Arrays.toString(actual));
         Assert.assertEquals(expected, actual);
     }