📖 Text Diff Algorithms Guide: Myers LCS & Version Comparison
Learn how diff algorithms calculate the Longest Common Subsequence (LCS), line insertions, and deletions.
How Diff Comparison Algorithms Work
Text diff checkers compare two text documents to identify additions, deletions, and line modifications. Most diff utilities rely on Eugene Myers' O(ND) Longest Common Subsequence (LCS) algorithm.
The algorithm builds an edit graph to compute the minimum number of edit operations required to transform Text A into Text B, tagging removed lines in red and added lines in green.
Frequently Asked Questions
Detailed specifications & guides FAQs.