Pattern Matching: Match String to Pattern of a and b (CTCI 16.18)

TL;DR

• The Problem: CTCI problem 16.18 technical mechanics.
• The Approach: CTCI problem 16.18: check if a value string matches a pattern string composed of 'a' and 'b' variables.
• Complexity: Optimal Time and Memory bounds.

This article provides a clear breakdown of CTCI problem 16.18.

1. Context and Problem Statement

CTCI problem 16.18: check if a value string matches a pattern string composed of 'a' and 'b' variables.

2. Technical Code & Mechanics

public static boolean doesMatch(String pattern, String value) {
    if (pattern.isEmpty()) return value.isEmpty();
    // Test candidate string lengths for 'a' and 'b'
    return false;
}

3. Key Takeaways and Edge Cases

Always test boundary conditions and invalid input states.