lab done

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

@@ -1,107 +1,195 @@
 package com.zipcodewilmington;
 
+import java.util.*;
+import java.util.stream.IntStream;
+
+import static java.lang.System.*;
+
 /**
  * Created by leon on 1/29/18.
  */
 public class StringArrayUtils {
     /**
      * @param array array of String objects
      * @return first element of specified array
-     */ // TODO
+     */ // WORKING
     public static String getFirstElement(String[] array) {
         return array[0];
     }
 
     /**
      * @param array array of String objects
      * @return second element in specified array
-     */
+     */ //WORKING
     public static String getSecondElement(String[] array) {
         return array[1];
     }
 
     /**
      * @param array array of String objects
      * @return last element in specified array
-     */ // TODO
+     */
+    //WORKING
     public static String getLastElement(String[] array) {
-        return null;
+        return array[array.length - 1];
     }
 
     /**
      * @param array array of String objects
      * @return second to last element in specified array
-     */ // TODO
+     */
+    //WORKING
     public static String getSecondToLastElement(String[] array) {
-        return null;
+
+        return array[array.length - 2];
     }
 
     /**
      * @param array array of String objects
      * @param value value to check array for
      * @return true if the array contains the specified `value`
-     */ // TODO
+     */ // WORKING
     public static boolean contains(String[] array, String value) {
-        return false;
+        boolean presentOrNot = false;
+        for (int i = 0; i < array.length; i++) {
+            if (array[i].equals(value)) {
+                return true;
+            } else {
+                presentOrNot = false;
+            }
+        }
+        return presentOrNot;
     }
 
     /**
      * @param array of String objects
      * @return an array with identical contents in reverse order
-     */ // TODO
+     */ // WORKING
     public static String[] reverse(String[] array) {
-        return null;
+        List<String> list = Arrays.asList(array);
+        Collections.reverse(list);
+        String[] revArr = list.toArray(array);
+        return revArr;
     }
 
     /**
      * @param array array of String objects
      * @return true if the order of the array is the same backwards and forwards
-     */ // TODO
+     */ // WORKING
     public static boolean isPalindromic(String[] array) {
-        return false;
+        Boolean revOrNot = false;
+        for (int i = 0; i < array.length / 2; i++) {
+            if (!array[i].equalsIgnoreCase((array[array.length - i - 1]))) {
+                revOrNot = false;
+            } else {
+                revOrNot = true;
+            }
+        }
+        return revOrNot;
     }
 
     /**
      * @param array array of String objects
      * @return true if each letter in the alphabet has been used in the array
-     */ // TODO
+     */ // WORKING
     public static boolean isPangramic(String[] array) {
-        return false;
+        boolean isOrIsnt = false;
+        boolean[] mark = new boolean[26];
+        String concatStr = "";
+        for (int i = 0; i < array.length; i++) {
+            concatStr = concatStr.concat(array[i]);
+        }
+        concatStr = concatStr.toUpperCase();
+        int index = 0;
+        for (int i = 0; i < concatStr.length(); i++) {
+            if ('A' <= concatStr.charAt(i) && concatStr.charAt(i) <= 'Z') {
+                index = concatStr.charAt(i) - 'A';
+            } else {
+                continue;
+            }
+            mark[index] = true;
+        }
+        for (int i = 0; i <= 25; i++) {
+            if (mark[i] == false) {
+                isOrIsnt = false;
+            } else {
+                isOrIsnt = true;
+            }
+        }
+    return isOrIsnt;
     }
-
     /**
      * @param array array of String objects
      * @param value value to check array for
      * @return number of occurrences the specified `value` has occurred
-     */ // TODO
+     */ // WORKING
     public static int getNumberOfOccurrences(String[] array, String value) {
-        return 0;
+        int numOfTimes = 0;
+        for (int i = 0; i < array.length; i++) {
+            if (array[i].equalsIgnoreCase(value)) {
+                numOfTimes++;
+            }
+        }
+        return numOfTimes;
     }
 
     /**
      * @param array         array of String objects
      * @param valueToRemove value to remove from array
      * @return array with identical contents excluding values of `value`
-     */ // TODO
+     */ // WORKING
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        ArrayList<String> output = new ArrayList<>();
+        int counter = 0;
+        for (int i = 0; i < array.length; i++) {
+            if (array[i].equals(valueToRemove)) {
+                continue;
+            } else {
+                output.add(array[i]);
+                counter++;
+            }
+        }
+        String[] outArr = output.toArray(new String[counter]);
+        return outArr;
     }
 
     /**
      * @param array array of chars
      * @return array of Strings with consecutive duplicates removes
-     */ // TODO
+     */ // WORKING
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+        ArrayList<String> strList = new ArrayList<>();
+        strList.add(array[0]);
+        for (int i = 1; i < array.length; i++) {
+            if (!array[i - 1].equals(array[i])) {
+                strList.add(array[i]);
+            }
+        }
+        String[] outStrArr = strList.toArray(new String[0]);
+        return outStrArr;
     }
 
     /**
      * @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
+     */ // WORKING
     public static String[] packConsecutiveDuplicates(String[] array) {
-        return null;
+        ArrayList<String> midList = new ArrayList<>();
+        String strHolder = "";
+        int counter = 0;
+        int compare = counter + 1;
+        while (counter < array.length) {
+            strHolder = strHolder.concat(array[counter]);
+            while (compare != array.length && array[counter].equals(array[compare])) {
+                strHolder = strHolder.concat(array[compare]);
+                compare++;
+            }
+            midList.add(strHolder);
+            strHolder = "";
+            counter = compare;
+            compare++;
+        }
+        String[] outArr = midList.toArray(new String[0]);
+        return outArr;
     }
-
-
 }