{Joson StringUtilities Lab}

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

@@ -1,5 +1,6 @@
 package com.zipcodewilmington;
-
+import java.util.ArrayList;
+import java.util.Arrays;
 /**
  * Created by leon on 1/29/18.
  */
@@ -9,15 +10,18 @@ public class StringArrayUtils {
      * @return first element of specified array
      */ // TODO
     public static String getFirstElement(String[] array) {
-        return null;
+
+        return array[0];
     }
 
     /**
      * @param array array of String objects
      * @return second element in specified array
      */
+
+
     public static String getSecondElement(String[] array) {
-        return null;
+        return array[1];
     }
 
     /**
@@ -25,7 +29,10 @@ public class StringArrayUtils {
      * @return last element in specified array
      */ // TODO
     public static String getLastElement(String[] array) {
-        return null;
+
+        int i = array.length - 1;
+
+        return array[i];
     }
 
     /**
@@ -33,7 +40,8 @@ public class StringArrayUtils {
      * @return second to last element in specified array
      */ // TODO
     public static String getSecondToLastElement(String[] array) {
-        return null;
+        int i = array.length - 2;
+        return array[i];
     }
 
     /**
@@ -42,6 +50,11 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
+
+        for (String s : array)
+            if (s.equals(value)) {
+                return true;
+            }
         return false;
     }
 
@@ -50,7 +63,14 @@ public class StringArrayUtils {
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+        String reverseString[] = new String[array.length];
+        int j = 0;
+        for (int i = array.length - 1; i >= 0; i--) {
+            String revWords = array[i];
+            reverseString[j] = revWords;
+            j++;
+        }
+        return reverseString;
     }
 
     /**
@@ -58,7 +78,16 @@ 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[] checkArray = reverse(array);
+        boolean look = false;
+        for (int i = 0; i < array.length - 1; i++) {
+            if (checkArray[i] == array[i]) {
+                look = true;
+            } else {
+                look = false;
+            }
+        }
+        return look;
     }
 
     /**
@@ -66,16 +95,39 @@ 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;
+        boolean check = false;
+        StringBuilder sb = new StringBuilder();
+        int i = 0;
+        for (i = 0; i < array.length; i++) {
+            sb.append(array[i]);
+            String newString = sb.toString().toLowerCase();
+            for (char ch = 'a'; ch <= 'z'; ch++) {
+                if (newString.indexOf(ch) == -1) {
+                    check = false;
+                } else {
+                    check = true;
+                }
+
+            }
+
+        }
+        return check;
     }
 
+
     /**
      * @param array array of String objects
      * @param value value to check array for
      * @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] == value) {
+                counter++;
+            }
+        }
+        return counter;
     }
 
     /**
@@ -84,7 +136,27 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+                /* StringBuilder sb = new StringBuilder();
+                 for (int i = 0; i < array.length; i++) {
+                if (array[i] != valueToRemove) {
+                sb.append(array[i]);
+                String goodString = sb.toString();
+                 String bestArray[ ] = goodString.split(" ");
+                */
+        ArrayList<String> newArray = new ArrayList<String>();
+        int i = 0;
+        while (i < array.length) {
+            if ((array[i]).equals(valueToRemove)) {
+                i++;
+            } else {
+                newArray.add(array[i]);
+                i++;
+            }
+        }
+        int s = newArray.size();
+        String newerArray[] = new String[s];
+        newArray.toArray(newerArray);
+        return newerArray;
     }
 
     /**
@@ -92,7 +164,20 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+        ArrayList<String> dups = new ArrayList<String>();
+        int i = 0;
+        while (i < array.length) {
+            if ((i + 1 < array.length) && array[i].equals(array[i + 1])) {
+                i++;
+            } else {
+                dups.add(array[i]);
+                i++;
+            }
+        }
+        int size = dups.size();
+        String duplicatesList[] = new String[size];
+        dups.toArray(duplicatesList);
+        return duplicatesList;
     }
 
     /**
@@ -100,8 +185,31 @@ 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;
+        int i = 0;
+        ArrayList<String> dups = new ArrayList<String>();
+        while (i < array.length) {
+            if (i > 0 && array[i].equals(array[i - 1])) {
+                String holder = dups.get(dups.size() - 1);
+                holder += array[i];
+                dups.set((dups.size() - 1), holder);
+                i++;
+            } else {
+                dups.add(array[i]);
+                i++;
+            }
+        }
+        int size = dups.size();
+        String packList[] = new String[size];
+        dups.toArray(packList);
+        return packList;
     }
 
-
 }
+
+
+
+
+
+
+
+