save1

StringArrayUtils.java

@@ -1,5 +1,4 @@
- 
-
+import java.util.Arrays;
 /**
  * Created by leon on 1/29/18.
  */
@@ -9,7 +8,7 @@ public class StringArrayUtils {
      * @return first element of specified array
      */ // TODO
     public static String getFirstElement(String[] array) {
-        return null;
+        return array[0];
     }
 
     /**
@@ -17,7 +16,7 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+        return array[1];
     }
 
     /**
@@ -25,7 +24,7 @@ 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 +32,7 @@ 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 +41,13 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+        boolean containsString = false;
+        for (String element : array)
+            if(element.equals(value)){
+                containsString = true;  
+                break;
+            }
+        return containsString;
     }
 
     /**
@@ -50,7 +55,11 @@ 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];
+        for(int i = 0; i < array.length; i++){
+            reverseString [array.length-1-i] = array[i];
+        }
+        return reverseString;
     }
 
     /**
@@ -58,15 +67,51 @@ 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[] reverseString = reverse(array);
+        boolean isTrue = false;
+        if(Arrays.equals(reverseString, array)){
+            return true;
+        }
+        return isTrue;
     }
 
     /**
      * @param array array of String objects
      * @return true if each letter in the alphabet has been used in the array
      */ // TODO
-    public static boolean isPangramic(String[] array) {
-        return false;
+
+    public static boolean isPangramic(String[] array){
+        char [] alphabet = {'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
+        boolean containsEveryLetter = true;
+        for(char letter:alphabet){
+            if(arrayContainsLetter(array,letter)==false){
+                containsEveryLetter = false;
+                break;
+            }
+        }
+        return containsEveryLetter;
+    }
+
+    public static boolean arrayContainsLetter(String[] array, char letter){
+        boolean containsLetter = false;
+        for(String string : array){
+            if(stringContainsLetter(string.toLowerCase(),letter)){
+                containsLetter = true;
+                break;
+            }
+        }
+        return containsLetter;
+    }
+
+    public static boolean stringContainsLetter(String string, char letter){
+        boolean containsLetter = false;
+        for(int i = 0; i < string.length(); i++){
+            if (string.charAt(i)==letter){
+                containsLetter = true;
+                break;
+            }
+        }
+        return containsLetter;
     }
 
     /**
@@ -75,16 +120,31 @@ 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 (String element : array){
+            if(element.equals(value)){
+                counter += 1;
+            }
+        }
+        return counter;
     }
 
     /**
-     * @param array         array of String objects
+     * @param array array of String objects
      * @param valueToRemove value to remove from array
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        int lengthOfNewArray = array.length-getNumberOfOccurrences(array,valueToRemove);
+        String[] newArray = new String[lengthOfNewArray];
+        int index = 0;
+        for(String element : array){           
+            if(element != valueToRemove){
+                newArray[index] = element;
+                index += 1;
+            }
+        }
+        return newArray;
     }
 
     /**
@@ -92,16 +152,23 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
-    }
-
-    /**
-     * @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[] sortedArray = array.sort();
+        
+        for(int i = 1; i < sortedArray.length; i++){
+            if(sortedArray[i]!=sortedArray[i-1]){
+                    add to array list
+            }
+        }
     }
+    return null;
+}
 
+/**
+ * @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;
+}
 
 }

StringArrayUtilsTest.java

@@ -164,7 +164,7 @@ public class StringArrayUtilsTest {
 
 
 
-
+    
 
 
     @Test
@@ -278,15 +278,38 @@ public class StringArrayUtilsTest {
 
     @Test
     public void testIsPangramic4() {
-        String[] array = {"a", "b", "c", "d"};
+        String[] array = {"aa", "bb", "cc", "dd"};
         boolean outcome = StringArrayUtils.isPangramic(array);
         Assert.assertFalse(outcome);
     }
 
+    @Test
+    public void teststringContainsLetter(){
+        String string = "A fox";
+        boolean outcome = StringArrayUtils.stringContainsLetter(string,'e');
+        Assert.assertFalse(outcome);
+    }
 
+    @Test
+    public void teststringContainsLetter2(){
+        String string = "A fox";
+        boolean outcome = StringArrayUtils.stringContainsLetter(string,'o');
+        Assert.assertTrue(outcome);
+    }
 
+    @Test
+    public void arrayContainsLetter(){
+        String[] string = {"A fox","bunny"};
+        boolean outcome = StringArrayUtils.arrayContainsLetter(string,'e');
+        Assert.assertFalse(outcome);
+    }
 
-
+    @Test
+    public void arrayContainsLetter2(){
+        String[] string = {"A fox","bunny"};
+        boolean outcome = StringArrayUtils.arrayContainsLetter(string,'o');
+        Assert.assertTrue(outcome);
+    }
 
 
 

package.bluej

@@ -0,0 +1,42 @@
+#BlueJ package file
+dependency1.from=StringArrayUtilsTest
+dependency1.to=StringArrayUtils
+dependency1.type=UsesDependency
+editor.fx.0.height=0
+editor.fx.0.width=0
+editor.fx.0.x=0
+editor.fx.0.y=0
+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=0
+package.editor.y=23
+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=ClassTarget
+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