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Deleting a Node in a Linked List

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Deleting a Node in a Linked List

Deleting a Node in a Linked List sits in a counter. Farhan’s job is a ticket queue node. Write that first.

Deleting a Node in a Linked List on the board: head → next → …. Then say what a ticket queue node looks like after.

Without Deleting a Node in a Linked List, a counter gets messy and a ticket queue node is hard to trust.

Deleting a Node in a Linked List shows up in a counter. Name a ticket queue node, not “a real-world scenario”.

Deleting a Node in a Linked List miss — losing the next pointer on delete. Fix it before you talk about advanced DSA.

Deleting a Node in a Linked List is not a lonely heading. Farhan ties it to a ticket queue node.

Close Deleting a Node in a Linked List with: “If I skip it, a ticket queue node goes wrong like this: losing the next pointer on delete.”

Diagram

  [10] → [20] → [30] → /
   head              tail

Exam tip

For Deleting a Node in a Linked List: definition + a counter + one failure.

Example

class Node:
    def __init__(self, val, next=None):
        self.val = val
        self.next = next

head = Node(1, Node(2, Node(3)))
cur = head
while cur:
    print(cur.val, end=" -> " if cur.next else "\n")
    cur = cur.next

Deleting a Node in a Linked List — a linked list chains nodes with next pointers instead of contiguous indexes.

Short notes

DefDeleting a Node in a Linked List — Farhan uses it for a ticket queue node in a counter.
RuleDeleting a Node in a Linked List → head → next → ….
RememberDeleting a Node in a Linked List + a dry-run table (a counter).
UseDeleting a Node in a Linked List in a counter (a ticket queue node).
TrapDeleting a Node in a Linked List — losing the next pointer on delete.
ExDeleting a Node in a Linked List → a ticket queue node.

class Node: def __init__(self, val, next=None): self.val = val self.next = next head = Node(1, Node(2, Node(3))) cur = head while cur: print(cur.val, end=" -> " if cur.next else "\n") cur = cur.next

Deleting a Node in a Linked List

Example

Short notes

Questions

Deleting a Node in a Linked List

Example

Short notes

Questions