Алгоритмы Myers Diff и LCS7 мин чтенияОбновлено:
Алгоритмы сравнения текста и кода: Руководство по Myers Diff и LCS
Изучите математику поиска различий, переключайтесь между раздельным и объединенным видом и безопасно проверяйте изменения.
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Ключевые моменты
- Алгоритм Майерса находит кратчайший путь правок с временной сложностью O(ND).
- Посимвольное сравнение точно подсвечивает изменения внутри измененных строк.
- Раздельный вид удобен для структурного анализа, а объединенный соответствует формату Git Patch.
- Локальное выполнение защищает закрытый код от попадания в журналы сторонних серверов.
100% In-Browser & Local Execution
Сравнивайте различия в коде и тексте
Анализируйте различия строка за строкой с подсветкой синтаксиса и точным выделением правок.
- Myers Diff algorithm
- Split & unified views
- Character-level highlighting
- Whitespace toggle
01.The Myers Diff Algorithm & Shortest Edit Script
Published by Eugene W. Myers in 1986, the Myers Diff algorithm finds the minimum number of insertions and deletions (the Shortest Edit Script) required to transform string A into string B. By modeling text comparison as a directed acyclic graph (edit graph) on a 2D grid, the algorithm executes an O(ND) search where N is the total length and D is the edit distance.
02.Split Side-by-Side vs. Unified Diff Visualization
Split view places original and modified files in parallel columns, synchronizing scroll positions for structural comparisons. Unified view interleaves additions (+) and deletions (-) in a single column, which is the standard format used by Git patches (git diff).
How to Compare Code and Text Revisions
Step-by-step instructions to inspect code diffs.
1
Paste Original Text
Paste the original source code or text into the left editor pane.
2
Paste Modified Text
Paste the updated revision into the right editor pane.
3
Toggle Diff View
Switch between Split (side-by-side) and Unified view modes depending on your preference.
4
Review Character Highlights
Inspect colored red (deleted) and green (added) inline highlights.
Frequently Asked Questions
No. The Myers diff algorithm executes 100% locally in your browser memory.