String Array utilities lab

pom.xml

@@ -7,6 +7,18 @@
     <groupId>com.zipcodewilmington.labs</groupId>
     <artifactId>arrayutils</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>

src/main/java/com/zipcodewilmington/StringArrayUtils.java

@@ -1,5 +1,10 @@
 package com.zipcodewilmington;
 
+import com.sun.org.apache.xpath.internal.operations.Bool;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
 /**
  * Created by leon on 1/29/18.
  */
@@ -17,6 +22,7 @@ public static String getFirstElement(String[] array) {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
+
         return array[1];
     }
 
@@ -25,15 +31,21 @@ public static String getSecondElement(String[] array) {
      * @return last element in specified array
      */ // TODO
     public static String getLastElement(String[] array) {
-        return null;
+        String result = "";
+
+        result = array[array.length - 1];
+
+        return result;
     }
 
     /**
      * @param array array of String objects
      * @return second to last element in specified array
      */ // TODO
     public static String getSecondToLastElement(String[] array) {
-        return null;
+        String result = "";
+        result = array[array.length - 2];
+        return result;
     }
 
     /**
@@ -42,31 +54,59 @@ public static String getSecondToLastElement(String[] array) {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+        Boolean result = false;
+        for (String word : array) {
+            if (word == value) {
+                result = true;
+            }
+        }
+        return result;
     }
 
     /**
      * @param array of String objects
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+        String[] result = new String[array.length];
+        int j = 0;
+        for (int i = array.length - 1; i >= 0; i--) {
+            result[j] = array[i];
+            j++;
+        }
+        return result;
     }
 
     /**
      * @param array array of String objects
      * @return true if the order of the array is the same backwards and forwards
      */ // TODO
     public static boolean isPalindromic(String[] array) {
-        return false;
+        Boolean result = true;
+        for (int i = 0; i < array.length; i++) {
+            if (!array[i].equals(array[array.length - i - 1])) {
+                result = false;
+            }
+        }
+        return result;
     }
 
     /**
      * @param array array of String objects
      * @return true if each letter in the alphabet has been used in the array
      */ // TODO
     public static boolean isPangramic(String[] array) {
-        return false;
+        String check=String.join("",array).toLowerCase();
+        String[] letters={"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
+           for(int i=0;i<letters.length;i++){
+            if(check.contains(letters[i])){
+            }
+            else
+            {
+                return false;
+            }
+           }
+        return true;
     }
 
     /**
@@ -75,7 +115,13 @@ public static boolean isPangramic(String[] array) {
      * @return number of occurrences the specified `value` has occurred
      */ // TODO
     public static int getNumberOfOccurrences(String[] array, String value) {
-        return 0;
+        int result = 0;
+        for (int i = 0; i < array.length; i++) {
+            if (array[i].equals(value)) {
+                result++;
+            }
+        }
+        return result;
     }
 
     /**
@@ -84,24 +130,64 @@ public static int getNumberOfOccurrences(String[] array, String value) {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        ArrayList<String> tempArray = new ArrayList<String>();
+        for (int i = 0; i < array.length; i++) {
+            if (!array[i].equals(valueToRemove)) {
+                tempArray.add(array[i]);
+
+            }
+        }
+        String[] result = new String[tempArray.size()];
+        result = tempArray.toArray(result);
+        return result;
     }
 
     /**
      * @param array array of chars
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+
+        ArrayList<String> tempArrayList = new ArrayList<String>();
+        for (int i = 0; i < array.length; i++) {
+            tempArrayList.add(array[i]);
+            if (i > 0) {
+                if (array[i].equals(array[i - 1])) {
+                    tempArrayList.remove(tempArrayList.size() - 1);
+                }
+            }
+        }
+        String[] result = new String[tempArrayList.size()];
+        result = tempArrayList.toArray(result);
+        return result;
     }
 
+
     /**
      * @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;
-    }
+        ArrayList<String> tempArrayList = new ArrayList<String>();
+//{"a", "a", "a", "b", "c", "c", "a", "a", "d"};
+        int j = 0;
+        tempArrayList.add(array[0]);
 
+        for(int i = 1; i < array.length; i++){
+            if(tempArrayList.get(j).contains(array[i]))
+            {
+                tempArrayList.set(j, (tempArrayList.get(j) + array[i]));
+            }
+            else
+            {
+                j++;
+                tempArrayList.add(array[i]);
+            }
+        }
 
-}
+        String[] result = new String[tempArrayList.size()];
+        result = tempArrayList.toArray(result);
+
+        return result;
+    }
+}

src/test/java/com/zipcodewilmington/GetConsecutiveDuplicatesTest.java

@@ -34,4 +34,4 @@ public void testRemoveConsecutiveDuplicates3() {
         Assert.assertEquals(actual, expected);
     }
 
-}
+}