Implementing removeGroup function

.idea/workspace.xml

@@ -6,9 +6,7 @@
   <component name="ChangeListManager">
     <list default="true" id="3f4b2924-17d7-4794-bacf-d51c4f0be8bb" name="Changes" comment="Counters for contain and removing">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/README.MD" beforeDir="false" afterPath="$PROJECT_DIR$/README.MD" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/SortList.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/SortList.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/test/java/SyncListTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/SyncListTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/RWLockList.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/RWLockList.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -25,7 +23,7 @@
   <component name="Git.Settings">
     <option name="RECENT_BRANCH_BY_REPOSITORY">
       <map>
-        <entry key="$PROJECT_DIR$" value="task1" />
+        <entry key="$PROJECT_DIR$" value="master" />
       </map>
     </option>
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
@@ -51,7 +49,7 @@
     "RunOnceActivity.OpenProjectViewOnStart": "true",
     "RunOnceActivity.ShowReadmeOnStart": "true",
     "SHARE_PROJECT_CONFIGURATION_FILES": "true",
-    "git-widget-placeholder": "task2__3__4",
+    "git-widget-placeholder": "extraphase",
     "kotlin-language-version-configured": "true",
     "project.structure.last.edited": "Modules",
     "project.structure.proportion": "0.0",

src/main/java/RWLockList.java

+import java.util.Collection;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 public class RWLockList extends SortList {
@@ -79,4 +80,35 @@ public class RWLockList extends SortList {
         }
     }
 
+    public int removeGroup(Collection<Integer> items) {
+        lock.writeLock().lock();
+        int internalSuccess = 0;
+        try {
+            for (Integer item : items) {
+                Entry prev = this.head;
+                Entry curr = prev.next;
+                while (curr.object.compareTo(item) < 0) {
+                    prev = curr;
+                    curr = prev.next;
+                }
+                if (curr.object.equals(item)) {
+                    prev.next = curr.next;
+                    this.length--;
+                    internalSuccess++;
+                }
+            }
+
+            if (internalSuccess > 0) {
+                removeSuccess+=internalSuccess;
+            } else {
+                if (!items.isEmpty()) {
+                    removeFailure+=items.size() - internalSuccess;
+                }
+            }
+        } finally {
+            lock.writeLock().unlock();
+        }
+        return internalSuccess;
+    }
+
 }

src/test/java/SyncListTest.java

@@ -26,7 +26,7 @@ public class SyncListTest extends TestCase {
         }
     }
 
-   public void helper(SortList list, String label, int numThreads, int randLen) {
+    public void helper(SortList list, String label, int numThreads, int randLen) {
         RandomSeq seq = new RandomSeq(0, 80_000);
         List<Thread> addThreads = new ArrayList<>();
         List<Thread> containThreads = new ArrayList<>();
@@ -147,4 +147,8 @@ public class SyncListTest extends TestCase {
 
         System.out.println("FINISHED benchmarking");
     }
+
+    public void testRemoveGroup(){
+
+    }
 }