committing StringArrayUtilities

StringArrayUtils.java

@@ -1,15 +1,13 @@
- 
 
-/**
- * Created by leon on 1/29/18.
- */
+import java.util.*;
 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 +15,7 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+        return array[1];
     }
 
     /**
@@ -25,7 +23,7 @@ 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 +31,7 @@ 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];
     }
 
     /**
@@ -42,6 +40,11 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
+        for(int i=0; i<array.length; i++){
+            if(array[i]==value){
+                return true;
+            }
+        }
         return false;
     }
 
@@ -50,7 +53,13 @@ public class StringArrayUtils {
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+        String[] arr = new String[array.length];
+        int j = 0;
+        for(int i=array.length-1; i>=0; i--){
+            arr [j] = array[i]; 
+            j++;
+        }
+        return arr;
     }
 
     /**
@@ -58,7 +67,18 @@ 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[] reversedArr = new String[array.length];
+        reversedArr = reverse(array);
+        boolean flag = true;
+        for(int i=0; i<reversedArr.length; i++){
+            if(!array[i].equalsIgnoreCase(reversedArr[i])){
+                flag = false;
+                break;
+            }
+        }
+        System.out.println(reversedArr);
+
+        return flag;
     }
 
     /**
@@ -66,7 +86,21 @@ 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;
+        String s = "";
+        for(String element: array){
+            s += element;
+        }
+        int NO_OF_LETTERS_OF_ALPHABET = 26;
+        if(s.length() < NO_OF_LETTERS_OF_ALPHABET){
+            return false;
+        }
+        for (char ch = 'A'; ch <= 'Z'; ch++) {
+            if (s.indexOf(ch) < 0
+            && s.indexOf((char) (ch + 32)) < 0) {
+                return false;
+            }
+        }
+        return true;
     }
 
     /**
@@ -75,7 +109,13 @@ public class StringArrayUtils {
      * @return number of occurrences the specified `value` has occurred
      */ // TODO
     public static int getNumberOfOccurrences(String[] array, String value) {
-        return 0;
+        int count = 0;
+        for(int i=0; i<array.length;i++){
+            if(value.equalsIgnoreCase(array[i].toString())){
+                count++;
+            }
+        }
+        return count;
     }
 
     /**
@@ -84,15 +124,38 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        int k = 0;
+        int n = getNumberOfOccurrences(array, valueToRemove);
+        String[] str = new String[array.length - n];
+        for(int i=0; i<array.length; i++)
+        {
+            if(!array[i].equals(valueToRemove))
+            {
+                str[k] = array[i];
+                k++;
+            }
+           
+        }
+        
+        return str; 
     }
 
+
     /**
      * @param array array of chars
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+        ArrayList<String> removedList = new ArrayList<String>();
+        removedList.add(array[0]);
+        for(int i=1; i<array.length; i++){
+            if(!array[i-1].equalsIgnoreCase(array[i])){
+                removedList.add(array[i]);
+            }
+        }
+        String[] finalArray = removedList.toArray(new String[removedList.size()]);
+
+        return finalArray;
     }
 
     /**
@@ -100,8 +163,28 @@ 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> list = new ArrayList<>();
+        list.add(array[0]);
+        int k=0;
 
+        for(int i = 1 ; i < array.length ; i++) {
+
+            if(array[i-1].equalsIgnoreCase(array[i])){
+
+                String lastElement = list.get(list.size()-1);
+
+                lastElement = lastElement.concat(array[i]);
+
+                list.set(list.size()-1,lastElement);
+            }
+            else{
+                list.add(array[i]);
+            }
+        }
+
+        String[] newArray = list.toArray(new String[list.size()]);
+        return newArray;
+    }
 
 }
+

StringArrayUtilsTest.java

@@ -1,4 +1,3 @@
- 
 
 import org.junit.Assert;
 import org.junit.Test;
@@ -24,7 +23,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testGetFirstElement3() {
         String[] array = {"brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -39,13 +37,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
-
     @Test
     public void testGetSecondElement1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -62,7 +53,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testGetSecondElement3() {
         String[] array = {"brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -76,11 +66,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
     @Test
     public void testGetLastElement1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -97,7 +82,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testGetLastElement3() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over"};
@@ -116,16 +100,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
-
-
-
-
     @Test
     public void testGetSecondToLastElement1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -142,7 +116,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testGetSecondToLastElement3() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over"};
@@ -159,14 +132,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
-
-
     @Test
     public void testContains() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -182,12 +147,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
     @Test
     public void testReverse1() {
         String[] array = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -196,7 +155,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testReverse2() {
         String[] array  = {"dog", "lazy", "the", "over", "jumps", "fox", "brown", "quick", "the"};
@@ -205,7 +163,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testReverse3() {
         String[] expected = {"the", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
@@ -217,11 +174,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
     @Test
     public void testIsPalindromic1() {
         String[] array = {"a", "b", "c", "b", "a"};
@@ -230,7 +182,6 @@ public class StringArrayUtilsTest {
     }
 
 
-
     @Test
     public void testIsPalindromic2() {
         String[] array = {"Is this a palindrome?", "This is a palindrome", "Is this a palindrome?"};
@@ -238,7 +189,6 @@ public class StringArrayUtilsTest {
         Assert.assertTrue(outcome);
     }
 
-
     @Test
     public void testIsPalindromic3() {
         String[] array = {"Is this a plaindrome?", "This is not a plaindrome", "Is this a palindrome?", "This is not a palindrome"};
@@ -250,10 +200,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
     @Test
     public void testIsPangramic1() {
         String[] array = {"The quick brown", "Fox jumps over", "The lazy dog"};
@@ -275,7 +221,6 @@ public class StringArrayUtilsTest {
         Assert.assertTrue(outcome);
     }
 
-
     @Test
     public void testIsPangramic4() {
         String[] array = {"a", "b", "c", "d"};
@@ -289,12 +234,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
     @Test
     public void testGetNumberOfOccurrences1() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "bba", "bba", "bba", "bbb", "bbb"};
@@ -325,13 +264,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
-
     @Test
     public void testRemoveConsecutiveDuplicates1() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "bba", "bba", "bba", "bbb", "bbb"};
@@ -341,7 +273,6 @@ public class StringArrayUtilsTest {
     }
 
 
-
     @Test
     public void testRemoveConsecutiveDuplicates2() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "zzz", "bba", "bba", "bba", "bbb", "bbb"};
@@ -350,7 +281,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(actual, expected);
     }
 
-
     @Test
     public void testRemoveConsecutiveDuplicates3() {
         String[] array = {"aba", "aba", "baa", "bab", "bba", "zzz", "bba", "bba", "bba", "aba", "bbb"};
@@ -364,11 +294,6 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
     @Test
     public void testRemovePackDuplicates1() {
         String[] array = {"a", "a", "a", "b", "c", "c", "a", "a", "d"};
@@ -377,7 +302,6 @@ public class StringArrayUtilsTest {
         Assert.assertEquals(expected, actual);
     }
 
-
     @Test
     public void testRemovePackDuplicates2() {
         String[] array = {"t", "t", "q", "a", "a", "a", "b", "c", "c", "a", "a", "d", "e", "e", "e"};
@@ -387,7 +311,6 @@ public class StringArrayUtilsTest {
     }
 
 
-
     @Test
     public void testRemovePackDuplicates3() {
         String[] array = {"m", "o", "o", "n", "m", "a", "n"};
@@ -399,16 +322,13 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
     @Test
     public void testRemoveValue() {
         String[] array = {"The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
         String[] expected = {"quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"};
         String[] actual = StringArrayUtils.removeValue(array, "The");
         Assert.assertEquals(expected, actual);
+
     }
 
     @Test
@@ -432,10 +352,4 @@ public class StringArrayUtilsTest {
 
 
 
-
-
-
-
-
-
 }

package.bluej

@@ -0,0 +1,42 @@
+#BlueJ package file
+dependency1.from=StringArrayUtilsTest
+dependency1.to=StringArrayUtils
+dependency1.type=UsesDependency
+editor.fx.0.height=722
+editor.fx.0.width=800
+editor.fx.0.x=465
+editor.fx.0.y=24
+objectbench.height=101
+objectbench.width=461
+package.divider.horizontal=0.6
+package.divider.vertical=0.8007380073800738
+package.editor.height=427
+package.editor.width=674
+package.editor.x=299
+package.editor.y=128
+package.frame.height=600
+package.frame.width=800
+package.numDependencies=1
+package.numTargets=2
+package.showExtends=true
+package.showUses=true
+project.charset=UTF-8
+readme.height=58
+readme.name=@README
+readme.width=47
+readme.x=10
+readme.y=10
+target1.height=50
+target1.name=StringArrayUtilsTest
+target1.showInterface=false
+target1.type=UnitTestTargetJunit4
+target1.width=150
+target1.x=130
+target1.y=10
+target2.height=50
+target2.name=StringArrayUtils
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=120
+target2.x=70
+target2.y=70