Strings and Pattern Matching

Module Contents

  1. Introduction to Strings

Master string manipulation in Java and Go. Learn about immutability, memory layout, and efficient concatenation using StringBuilder.

  1. String Searching

Learn the fundamentals of string searching. Visualize the Naive String Search algorithm and understand its time complexity.

  1. Sliding Window on Strings

  2. Frequency Counting

  3. Palindrome Problems

  4. Interview Training: Strings

Practice essential String patterns. Redirects to the Problem Vault for deep-dive solutions.

  1. Trie (Prefix Tree)

  2. String Compression

  3. Real World Applications

  4. Module Review: Strings

Review key concepts from the Strings module including immutability, builders, and searching algorithms.

Strings and Pattern Matching

[!NOTE] This module explores the core principles of Strings and Pattern Matching, deriving solutions from first principles and hardware constraints to build world-class, production-ready expertise.

1. Practice

[!NOTE] Looking for hands-on algorithmic exercises? We have migrated all coding challenges for this module into the Problem Vault to give you a centralized, focused practice environment.

Module Chapters

Chapter 03

Sliding Window on Strings

Master the Sliding Window technique for string problems. Learn to solve 'Longest Substring Without Repeating Characters' and 'Find All Anagrams' with interactive visualizations.

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Chapter 04

Frequency Counting

Learn why `int[26]` is faster than `HashMap` for string problems. Master the frequency counting pattern to solve Anagrams and Palindrome Permutations efficiently.

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Chapter 06

Palindrome Problems

Master the Two-Pointer technique for palindromes. Learn how to check for valid palindromes and find the longest palindromic substring by expanding from the center.

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Chapter 07

Trie (Prefix Tree)

Learn the Trie data structure for efficient string search and autocomplete. Implement `insert`, `search`, and `startsWith` in Java.

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Chapter 09

Real World Applications

Discover how string algorithms power real-world systems. Explore URL Shortening (Base62), Plagiarism Detection (Rabin-Karp), and Text Editors (Ropes).

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