complete

StringArrayUtils.java

@@ -1,5 +1,4 @@
- 
-
+import java.util.ArrayList; 
 /**
  * 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];
     }
 
     /**
@@ -42,15 +41,32 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+        boolean match = false;
+        for(int i = 1; i < array.length; i++){
+            if(array[i] == value){
+                match = true;
+                break;
+            } else {
+
+                match = false;
+            }
+        }
+        return match;
     }
 
     /**
-     * @param array of String objects
+     * @param array of String objectsjava object api
+     * 
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+        String temp;
+        for(int i = 0; i < array.length/2; i++){
+            temp = array[i];
+            array[i] = array[array.length-1 -i];
+            array[array.length -1 -i] = temp;
+        }
+        return array;
     }
 
     /**
@@ -58,7 +74,16 @@ 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;
+        boolean palindrome = false;
+        for(int i = 0; i < array.length/2; i++){
+            if( array[i] == array[array.length-1 -i]){
+                palindrome = true;
+            }else {
+                palindrome = false;
+            }
+
+        }
+        return palindrome;
     }
 
     /**
@@ -66,7 +91,24 @@ 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 pan = false;
+        StringBuilder build = new StringBuilder();
+        for (String s: array){
+            build.append(s);
+        }
+            String ofArr = "";
+            ofArr = build.toString();
+        
+        for(char i = 'A'; i <='Z'; i++){
+            if((ofArr.indexOf(i) < 0) && (ofArr.indexOf((char)(i+32))<0)){
+                pan = false;
+            }else{
+                pan = true;
+            }
+
+        }
+
+        return pan;
     }
 
     /**
@@ -74,8 +116,17 @@ public class StringArrayUtils {
      * @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;
+     public static int getNumberOfOccurrences(String[] array, String value) {
+        
+         int occurrances = 0;
+         
+         for(String i : array) {
+            if(value == i){
+            occurrances++;
+               }
+            }
+         
+         return occurrances;
     }
 
     /**
@@ -84,7 +135,17 @@ public class StringArrayUtils {
      * @return array with identical contents excluding values of `value`
      */ // TODO
     public static String[] removeValue(String[] array, String valueToRemove) {
-        return null;
+        int index = 0;
+        int count = getNumberOfOccurrences(array, valueToRemove);
+        String[] newArr = new String [array.length-count];
+        
+        for(int i=0; i < array.length; i++){
+            if (array[i] != valueToRemove) {
+            newArr[index] = array[i];
+            index++;
+           }
+        }
+        return newArr;
     }
 
     /**
@@ -92,7 +153,26 @@ public class StringArrayUtils {
      * @return array of Strings with consecutive duplicates removes
      */ // TODO
     public static String[] removeConsecutiveDuplicates(String[] array) {
-        return null;
+            String last = null;
+            int index = 0;
+            int count = 0;
+            
+            for(int i = 0; i < array.length -1; i++){
+                if(array[i].equals(array[i +1])){
+                count++;
+            }
+            }
+            
+            String[] newArr = new String [array.length-count];
+            
+            for(int i = 0; i < array.length; i++) {
+            if (!array[i].equals(last)){
+            newArr[index]=array[i];
+            last = array[i];
+            index++;
+            }
+            }
+            return newArr;
     }
 
     /**
@@ -100,8 +180,32 @@ 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 getCounting = getCount(array);
+        String[] savedArr = new String[array.length-getCounting];
+        String last = array[0];
+        savedArr[0] = array[0];
+        int index = 0;
+        
+        for(int i = 1; i < array.length; i++){
+            if(array[i].equals(last)){
+            savedArr[index] += array[i];
+            }
+            else {
+            index++;
+            savedArr[index] = array[i];
+            last = array[i];
+           }
+        }
+        return savedArr;
     }
-
-
+        
+    private static int getCount(String[] array){
+    int count = 0;
+    for(int i = 0; i < array.length - 1;i++){
+        if(array[i].equals(array[i + 1])) {
+            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=709
+editor.fx.0.width=800
+editor.fx.0.x=371
+editor.fx.0.y=23
+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=73
+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=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