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String Algorithms: Mastering Text Processing

6 min readApr 28, 2025

Your guide to string matching with Naive, KMP, Rabin-Karp, Tries, and Longest Palindromic Substring

Photo by AltumCode on Unsplash

String algorithms are essential for processing and analyzing text, powering applications like search engines, text editors, and bioinformatics. Efficient string manipulation can make or break performance in these domains. In this tenth article of our Essential Algorithms for Programmers series, we’ll explore key string algorithms: Naive String Matching, Knuth-Morris-Pratt (KMP), Rabin-Karp, Trie data structures, and Longest Palindromic Substring. We’ll dive into how they work, their complexities, and when to use each.

Why String Algorithms Matter

Strings are ubiquitous in programming, representing text, DNA sequences, or code. String algorithms enable:

  • Efficient Search: Quickly find patterns in large texts (e.g., Ctrl+F, autocomplete).
  • Data Processing: Analyze sequences in bioinformatics or natural language processing.
  • Interview Success: String problems are common in technical interviews, testing pattern recognition and optimization skills.

Mastering these algorithms will make you adept at handling text-based problems efficiently.

What Are String Algorithms?

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Ismail Tasdelen
Ismail Tasdelen

Written by Ismail Tasdelen

I'm Ismail Tasdelen. I have been working in the cyber security industry for +7 years. Don't forget to follow and applaud to support my content.

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