add remove, remove_last, sub_sort

list.py

@@ -10,6 +10,22 @@ class Element:
         else:
             return 1 + self.next.length()
 
+    def remove(self,value):
+        previous = self
+        current = self.next
+        while current is not None:
+            if current.data == value:
+                previous.next = current.next
+            previous = previous.next
+            current = current.next
+
+    def remove_last(self):
+        # Rekursive Methode zur Entfernung des letzten Elements
+        if self.next.next is not None:
+            self.next.remove_last()
+        else:
+            self.next = None
+
 
 class Liste:
     def __init__(self):
@@ -22,7 +38,9 @@ class Liste:
 
     def remove_first(self):
         if self.head is not None:
+            value = self.head.data
             self.head = self.head.next
+            return value
 
     def length(self):
         if self.head is None:
@@ -44,6 +62,32 @@ class Liste:
             current = current.next
         return None
 
+    def remove2(self, value):
+        # Iterative Lösung der Löschfunktion
+        if self.head is None:
+            return
+
+        if self.head.data == value:
+            self.head = self.head.next
+            return
+
+        previous = self.head
+        current = previous.next
+        while current is not None:
+            if current.data == value:
+                previous.next = current.next
+                return
+            previous = previous.next
+            current = current.next
+
+    def remove(self,value):
+        if self.head is None:
+            return
+        if self.head.data == value:
+            self.head = self.head.next
+        else:
+            self.head.remove(value)
+
     def insert_before(self, value, comp_value):
         new_element = Element(value)
         if self.head is None:
@@ -60,4 +104,53 @@ class Liste:
 
         if current.next is not None:
             new_element.next = current.next
-            current.next = new_element
+            current.next = new_element
+
+    def remove_last(self):
+        # Rekursive Methode zur Entfernung des letzten Elements
+        if self.head is not None:
+            if self.head.next is not None:
+                self.head.remove_last()
+            else:
+                self.head = None
+
+    def remove_last_2(self):
+        # Iterative Methode zur Entfernung des letzten Elements
+        current = self.head
+        if current is None:
+            return
+        elif current.next is None:
+            self.head = None
+            return
+        else:
+            previous = self.head
+            current = current.next
+            while current.next is not None:
+                previous = current
+                current = current.next
+            previous.next = None
+            return
+
+    def insert_sorted(self, value):
+        new_element = Element(value)
+        if self.head is None:
+            self.head = new_element
+            return
+
+        if self.head.data > value:
+            new_element.next = self.head
+            self.head = new_element
+            return
+
+        current = self.head
+        while current.next is not None and current.next.data < value:
+            current = current.next
+
+        new_element.next = current.next
+        current.next = new_element
+
+    def sub_sort(self):
+        if self.head is not None:
+            value = self.remove_first()
+            self.sub_sort()
+            self.insert_sorted(value)

main.py

@@ -1,9 +1,10 @@
-from list_composite_pattern import Liste
+from list import Liste
 
 liste = Liste()
-liste.insert(3)
-liste.insert(2)
 liste.insert(1)
+liste.insert(2)
+liste.insert(4)
+liste.insert(3)
 
 print("Inhalt der Liste:")
 liste.show_list()
@@ -12,6 +13,16 @@ print("Länge der Liste:", liste.length())
 
 print("Suche nach Wert 2:", liste.search(2).data if liste.search(2) else "Nicht gefunden")
 
-liste.insert_before(1.5, 2)
+print("---")
-print("Inhalt der Liste nach Einfügen von 1.5 vor 2:")
+
-liste.show_list()
+liste.remove(1)
+liste.show_list()
+
+# liste.insert_before(4, 2)
+# print("Inhalt der Liste nach Einfügen von 1.5 vor 2:")
+# liste.show_list()
+#
+# print("---")
+# liste.remove_last()
+# liste.remove_last()
+# liste.show_list()