21. Delete Node Without Head Pointer
Copies value of node.next into the current node, then deletes node.next in O(1) time.
Live loop — open the studio to scrub, add your own array, or race it in Battle Arena.
Asked in interviews at
Reference implementation (Python)
def delete_node(node):
# Overwrite value from next node
node.val = node.next.val
# Bypass next node
node.next = node.next.nextEmbed this visualization
Drop a live, looping 21. Delete Node Without Head Pointer canvas into a blog post or course page.
<iframe src="/embed/delete-node-no-head" width="100%" height="380" style="border:1px solid #e6e8ec;border-radius:14px" loading="lazy" title="3D algorithm visualization by CodeWithMunnaX"></iframe>Frequently asked
What is the time and space complexity of 21. Delete Node Without Head Pointer?
21. Delete Node Without Head Pointer runs in O(1) time and O(1) auxiliary space.
Is the 21. Delete Node Without Head Pointer visualizer free?
The core 3D visualizer, Web Audio chimes and step intuition are free. A one-time ₹49 Pro Pass unlocks advanced algorithms, large custom arrays, Battle Arena and reel export.
Which companies ask 21. Delete Node Without Head Pointer in interviews?
21. Delete Node Without Head Pointer shows up in interviews at Microsoft, Apple, Bloomberg.
How does the 3D visualization of 21. Delete Node Without Head Pointer work?
Each array value becomes a 3D pillar whose height maps to its value. Comparisons glow amber, swaps flash red, and settled elements lock green while a floating pointer badge tracks the active index — synchronized line-by-line with the Python code.