DSA · Theory

Inorder Traversal

Theory

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Inorder Traversal

If you can teach Inorder Traversal using a Inorder Traversal dry-run, you know it. If you only know the heading, you don’t.

Inorder Traversal order: meaning → one Inorder Traversal step Amit can write from memory → one limit. Dumping ten features helps nobody.

Skip Inorder Traversal and skipping the failure case for Inorder Traversal shows up in a campus project.

Amit ships Inorder Traversal in a campus project. That is the use case worth saying.

Don’t do this with Inorder Traversal: skipping the failure case for Inorder Traversal. Interviewers spot it in ten seconds.

After Inorder Traversal, Amit should still remember skipping the failure case for Inorder Traversal.

Viva for Inorder Traversal: what it is → one Inorder Traversal step Amit can write from memory → the mistake (skipping the failure case for Inorder Traversal).

Exam tip

Board: a Inorder Traversal dry-run. Dry-run Inorder Traversal. Name the trap: skipping the failure case for Inorder Traversal.

Example

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

def inorder(n):
    if not n:
        return []
    return inorder(n.left) + [n.val] + inorder(n.right)

root = Node(2, Node(1), Node(3))
print(inorder(root))

Inorder Traversal — inorder walks left → node → right (sorted order for a BST).

Short notes

DefInorder Traversal — Amit uses it for a Inorder Traversal dry-run in a campus project.
RuleInorder Traversal → one Inorder Traversal step Amit can write from memory.
RememberInorder Traversal + time vs memory (a campus project).
UseInorder Traversal in a campus project (a Inorder Traversal dry-run).
TrapInorder Traversal — skipping the failure case for Inorder Traversal.
ExInorder Traversal → a Inorder Traversal dry-run.

class Node: def __init__(self, val, left=None, right=None): self.val, self.left, self.right = val, left, right def inorder(n): if not n: return [] return inorder(n.left) + [n.val] + inorder(n.right) root = Node(2, Node(1), Node(3)) print(inorder(root))

Inorder Traversal

Example

Short notes

Questions

Inorder Traversal

Example

Short notes

Questions