Merge pull request TheAlgorithms#162 from coreywho/master

Recursive solution to insert_tail in singly_LinkedList

data_structures/LinkedList/singly_LinkedList.py

@@ -3,22 +3,15 @@ def __int__(self,data):
         self.data=data#given data
         self.next=None#given next to None
 class Linked_List:
+
     pass
-    def insert_tail(Head,data):#insert the data at tail
-        tamp=Head#create a tamp as a head
-        if(tamp==None):#if linkedlist is empty
-            newNod=Node()#create newNode Node type and given data and next
-            newNod.data=data
-            newNod.next=None
-            Head=newNod
+
+    def insert_tail(Head,data):
+        if(Head.next is None):
+            Head.next = Node(data)
         else:
-            while tamp.next!=None:#find  the last Node
-                tamp=tamp.next
-            newNod = Node()#create a new node
-            newNod.data = data
-            newNod.next = None
-            tamp.next=newNod#put the newnode into last node
-        return Head#return first node  of  linked list  
+            insert_tail(Head.next, data)
+
     def insert_head(Head,data):
         tamp = Head
         if (tamp == None):
@@ -32,16 +25,18 @@ def insert_head(Head,data):
             newNod.next = Head#put the Head at NewNode Next
             Head=newNod#make a NewNode to Head
         return Head   
-    def Print(Head):#print every node data
-        tamp=Node()
+
+    def printList(Head):#print every node data
         tamp=Head
         while tamp!=None:
             print(tamp.data)
             tamp=tamp.next
+
     def delete_head(Head):#delete from head
         if Head!=None:
             Head=Head.next
         return Head#return new Head
+
     def delete_tail(Head):#delete from tail
         if Head!=None:
             tamp = Node()
@@ -50,12 +45,6 @@ def delete_tail(Head):#delete from tail
                 tamp = tamp.next
             tamp.next=None#delete the last element by give next None to 2nd last Element
         return Head
-    def isEmpty(Head):
-        if(Head==None):#check Head is None  or Not
-            return True#return Ture if list is empty
-        else:
-            return False#check False if it's not empty
-
-
-
 
+    def isEmpty(Head):
+        return Head is None #Return if Head is none