completed lab

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

@@ -3,13 +3,14 @@ package com.zipcodewilmington;
 /**
  * Created by leon on 1/29/18.
  */
+import java.util.ArrayList;
 public class StringArrayUtils {
     /**
      * @param array array of String objects
      * @return first element of specified array
      */ // TODO
     public static String getFirstElement(String[] array) {
-        return null;
+        return array[0];
     }
 
     /**
@@ -17,7 +18,7 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+        return array[1];
     }
 
     /**
@@ -25,7 +26,7 @@ public class StringArrayUtils {
      * @return last element in specified array
      */ // TODO
     public static String getLastElement(String[] array) {
-        return null;
+        return array[array.length-1];
     }
 
     /**
@@ -33,7 +34,7 @@ public class StringArrayUtils {
      * @return second to last element in specified array
      */ // TODO
     public static String getSecondToLastElement(String[] array) {
-        return null;
+        return array[array.length-2];
     }
 
     /**
@@ -42,7 +43,14 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+        boolean containsValue = true;
+        for (int i = 0; i < array.length; i++){
+            if (array[i].equals(value)) {
+                containsValue = true;
+
+            }
+        }
+        return containsValue;
     }
 
     /**
@@ -50,7 +58,14 @@ public class StringArrayUtils {
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+        String reverseArray[] = new String[array.length];
+        int j = 0;
+        for (int i = array.length-1; i >=0; i--) {
+            String arrayElement = array[i];
+            reverseArray[j] = arrayElement;
+            j++;
+        }
+        return reverseArray;
     }
 
     /**
@@ -58,7 +73,15 @@ public class StringArrayUtils {
      * @return true if the order of the array is the same backwards and forwards
      */ // TODO
     public static boolean isPalindromic(String[] array) {
-        return false;
+       String[] checkReverse = reverse(array);
+       boolean isPalindromic = false;
+       for (int i = 0; i < array.length; i++) {
+           if (checkReverse[i] == array[i]) {
+               isPalindromic =true;
+           } else {
+               isPalindromic = false;
+           }
+       }return isPalindromic;
     }
 
     /**
@@ -66,7 +89,21 @@ public class StringArrayUtils {
      * @return true if each letter in the alphabet has been used in the array
      */ // TODO
     public static boolean isPangramic(String[] array) {
-        return false;
+       StringBuilder arrayString = new StringBuilder();
+       boolean isPangramic = true;
+        for (int i = 0; i < array.length; i++) {
+            arrayString.append(array[i]);
+            String newString = arrayString.toString().toLowerCase();
+
+            for (char c = 'a'; c <= 'z'; c++) {
+                if (newString.indexOf(c) == -1) {
+                    isPangramic = false;
+                }else {
+                    isPangramic = true;
+                }
+            }
+        } return isPangramic;
+
     }
 
     /**
@@ -75,7 +112,13 @@ public class StringArrayUtils {
      * @return number of occurrences the specified `value` has occurred
      */ // TODO
     public static int getNumberOfOccurrences(String[] array, String value) {
-        return 0;
+        int counter = 0;
+        for (int i = 0; i < array.length; i++){
+            if (array[i].equals(value)) {
+                counter++;
+            }
+        }
+        return counter;
     }
 
     /**
@@ -84,7 +127,21 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        ArrayList <String> newArray = new ArrayList();
+        int i =0;
+        while (i<array.length){
+            if (array[i].equals(valueToRemove)){
+                i++;
+            }else{
+                newArray.add(array[i]);
+                i++;
+            }
+
+        }
+        int size = newArray.size();
+        String newArray2[] = new String[size];
+        newArray.toArray(newArray2);
+        return newArray2;
     }
 
     /**
@@ -92,7 +149,20 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+        ArrayList <String> allDups = new ArrayList();
+        int i = 0;
+        while (i < array.length){
+            if (i+1 < array.length && array[i].equals(array[i+1])){
+              i++;
+            }else{
+                allDups.add(array[i]);
+                i++;
+            }
+        }
+        int size = allDups.size();
+        String newArray2[] = new String[size];
+        allDups.toArray(newArray2);
+        return newArray2;
     }
 
     /**
@@ -100,7 +170,26 @@ public class StringArrayUtils {
      * @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> allDups = new ArrayList();
+        int i = 0;
+        while (i < array.length) {
+            if (i>0 && array[i].equals(array[i - 1])) {
+                String addString = allDups.get(allDups.size() - 1);
+                addString += array[i];
+                allDups.set(allDups.size() -1 , addString);
+                i++;
+            } else{
+                allDups.add(array[i]);
+                i++;
+            }
+
+        }
+
+        int size = allDups.size();
+        String newArray2[] = new String[size];
+        allDups.toArray(newArray2);
+        return newArray2;
+
     }