completed StringArrayUtilities

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

@@ -1,5 +1,9 @@
 package com.zipcodewilmington;
 
+
+import java.util.*;
+
+
 /**
  * Created by leon on 1/29/18.
  */
@@ -9,7 +13,7 @@ public class StringArrayUtils {
      * @return first element of specified array
      */ // TODO
     public static String getFirstElement(String[] array) {
-        return null;
+        return array[0];
     }
 
     /**
@@ -17,7 +21,8 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+
+        return array[1];
     }
 
     /**
@@ -25,7 +30,8 @@ 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 +39,8 @@ 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 +49,13 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+
+
+        if (Arrays.asList(array).contains(value)) {
+            return true;
+        } else {
+            return false;
+        }
     }
 
     /**
@@ -50,7 +63,16 @@ public class StringArrayUtils {
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+
+        String[] newArr = new String[array.length];
+        int counter = 0;
+        for (int i = array.length - 1; i >= 0; i--) {
+            newArr[counter] = array[i];
+
+            counter++;
+            //counter = counter +1;
+        }
+        return newArr;
     }
 
     /**
@@ -58,7 +80,17 @@ 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;
+
+        boolean isPal = false;
+        for (int i = 0; i < array.length; i++) {
+            if (reverse(array)[0].equals(array[i])) {
+                isPal = true;
+
+            } else {
+
+            }
+        }
+        return isPal;
     }
 
     /**
@@ -66,7 +98,23 @@ 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;
+        String character = "abcdefghijklmnopqrstuvwxyz";
+        String stringArray = "";
+
+        for (int i = 0; i < array.length; i++) {
+            stringArray = stringArray + array[i];
+        }
+        stringArray = stringArray.toLowerCase();
+
+        for (int i = 0; i < stringArray.length(); i++) {
+            for (int j = 0; j < character.length(); j++) {
+                if (stringArray.indexOf(character.charAt(j)) == -1) {
+                    return false;
+
+                }
+            }
+        }
+        return true;
     }
 
     /**
@@ -75,7 +123,13 @@ 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 (value.equals(array[i]))
+                counter++;
+        }
+        return counter;
     }
 
     /**
@@ -84,7 +138,15 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+
+        StringBuilder newString = new StringBuilder();
+        for (int i = 0; i < array.length; i++) {
+            if (!array[i].equals(valueToRemove)) {
+                newString.append(array[i] + " ");
+            }
+
+        }
+        return newString.toString().split(" ");
     }
 
     /**
@@ -92,16 +154,46 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+
+      String[] differentArray = new String[array.length];
+      int counter = 0;
+      for (int i = 1; i < array.length; i++){
+          String newWord = array[i-1];
+          if(!newWord.equals(array[i])){
+              differentArray[counter] = array[i-1];
+              counter++;
+          }
+      }
+      differentArray[counter] = array[array.length -1];
+      return Arrays.copyOf(differentArray, counter+1);
     }
 
+
+
     /**
      * @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;
-    }
 
+        String [] newArray = new String[ array.length];
+        int newIndex = 0;
+        String last = array[0];
+        String combiner = array[0];
 
+        for (int i = 1; i < array.length; i++){
+            if (!last.equals(array[i])){
+                last = array[i];
+                newArray[newIndex] = combiner;
+                combiner = array[i];
+                newIndex++;
+
+            } else{
+                combiner+= array[i];
+            }
+        }
+        newArray[newIndex] = combiner;
+        return Arrays.copyOf(newArray, newIndex +1);
+    }
 }
+

src/test/java/com/zipcodewilmington/StringArrayUtilsTest.java

@@ -34,18 +34,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testGetSecondElement1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -72,15 +60,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testGetLastElement1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -107,25 +86,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testGetSecondToLastElement1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -152,21 +112,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testContains() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -177,17 +122,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testReverse1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -199,7 +133,7 @@ public class StringArrayUtilsTest {
 
     @Test
     public void testReverse2() {
-        String[] array  = {"dog", "lazy", "the", "over", "jumps", "fox", "brown", "quick", "the"};
+        String[] array = {"dog", "lazy", "the", "over", "jumps", "fox", "brown", "quick", "the"};
         String[] expected = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
         String[] actual = StringArrayUtils.reverse(array);
         Assert.assertEquals(expected, actual);
@@ -214,14 +148,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testIsPalindromic1() {
         String[] array = {"a", "b", "c", "b", "a"};
@@ -230,7 +156,6 @@ public class StringArrayUtilsTest {
     }
 
 
-
     @Test
     public void testIsPalindromic2() {
         String[] array = {"Is this a palindrome?", "This is a palindrome", "Is this a palindrome?"};
@@ -247,13 +172,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testIsPangramic1() {
         String[] array = {"The quick brown", "Fox jumps over", "The lazy dog"};
@@ -284,17 +202,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testGetNumberOfOccurrences1() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "bba", "bba", "bba", "bbb", "bbb"};
@@ -320,18 +227,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testRemoveConsecutiveDuplicates1() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "bba", "bba", "bba", "bbb", "bbb"};
@@ -341,7 +236,6 @@ public class StringArrayUtilsTest {
     }
 
 
-
     @Test
     public void testRemoveConsecutiveDuplicates2() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "zzz", "bba", "bba", "bba", "bbb", "bbb"};
@@ -360,15 +254,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testRemovePackDuplicates1() {
         String[] array = {"a", "a", "a", "b", "c", "c", "a", "a", "d"};
@@ -387,7 +272,6 @@ public class StringArrayUtilsTest {
     }
 
 
-
     @Test
     public void testRemovePackDuplicates3() {
         String[] array = {"m", "o", "o", "n", "m", "a", "n"};
@@ -397,12 +281,6 @@ public class StringArrayUtilsTest {
     }
 
 
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     @Test
     public void testRemoveValue() {
         String[] array = {"The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -428,14 +306,4 @@ public class StringArrayUtilsTest {
     }
 
 
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 }