AC done

StringArrayUtils.java

@@ -1,15 +1,15 @@
- 
 
 /**
  * Created by leon on 1/29/18.
  */
+//import Arrays.array
 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];//null;
     }
 
     /**
@@ -17,7 +17,7 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+        return array[1];
     }
 
     /**
@@ -25,7 +25,7 @@ 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 +33,7 @@ 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 +42,12 @@ 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].equals(value)) {
+                return true;
+            }
+
+        }
         return false;
     }
 
@@ -50,7 +56,13 @@ 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 n = 0;
+        for (int i = array.length -1; i >=0; i--){
+            arr[n] = array[i];
+            n++;
+        }
+        return arr;
     }
 
     /**
@@ -58,7 +70,15 @@ 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;
+        boolean bool = false;
+
+        for (int i = 0; i < array.length / 2; i++){
+            if (array[i] == array[array.length-i-1]){
+                bool = true;
+            } 
+
+        }
+        return bool;
     }
 
     /**
@@ -66,7 +86,24 @@ 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 bool = false;
+
+        StringBuilder stringBuilder = new StringBuilder();
+
+        for (String x : array){
+            stringBuilder.append(x);
+        }
+
+        String s = "";
+        s = stringBuilder.toString();
+        for(char i = 'A'; i <= 'Z'; i++){
+            if ((s.indexOf(i) < 0) && (s.indexOf((char)i+32)< 0)){
+                bool = false;
+            }else{
+                bool = true;
+            }
+        }
+        return bool;
     }
 
     /**
@@ -75,7 +112,14 @@ 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(array[i].equals(value)) {
+                count++;
+            }
+        }
+
+        return count;
     }
 
     /**
@@ -84,7 +128,16 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        int count = 0;
+        int occurrences = getNumberOfOccurrences(array, valueToRemove);
+        String[] arr = new String[array.length-occurrences]; 
+        for (String s : array) {
+            if (s != valueToRemove) {
+                arr[count] = s;
+                count++;
+            }
+        }
+        return arr;
     }
 
     /**
@@ -92,7 +145,22 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+        String [] arr = new String[array.length];
+        int newArrayIndex = 0;
+
+        arr[newArrayIndex] = array[0];
+
+        newArrayIndex++;
+        for (int i = 1; i < array.length; i++){
+            if(!(arr[newArrayIndex-1]).equals(array[i])){
+                arr[newArrayIndex] = array[i];
+                newArrayIndex++;
+            }
+
+        }
+        String[] newArray = new String[newArrayIndex];
+        System.arraycopy(arr, 0, newArray, 0, newArrayIndex);
+        return newArray;
     }
 
     /**
@@ -100,8 +168,41 @@ 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;
+         StringBuilder build = new StringBuilder(array[0]);
+
+        String[] newArr = new String[array.length-count(array)]; 
+        int counter = 0; 
+        for(int i = 1; i<array.length; i++){
+            if(array[i-1].equals(array[i])){
+                build.append(array[i]);
+
+            }
+            else{
+                newArr[counter] = build.toString();
+                build.setLength(0);
+                build.append(array[i]);
+                counter++;
+            }
+        }
+        
+        newArr[counter] = build.toString();
+        return newArr;
+    }
+
+    public static int count(String[] array){
+        int count = 0;
+        for(int i = 1; i<array.length; i++){
+            if(array[i-1].equals(array[i])) {
+
+                count++;
+            }
+        }
+
+        return count;
+    }
+
+
+
     }
 
 
-}

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=92
+editor.fx.0.y=112
+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=158
+package.editor.y=76
+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