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How JSON Diff Works Under the Hood: Trees, Paths, and a Few Classic AlgorithmsA technical look at how semantic JSON diffing works: why text diff fails, how tree comparison reports changes by key path, and how LCS, unordered matching, and recursion combine into a practical JSON diff engine.Oct 3, 2026 · 6 min readJSON Array Comparison in Practice: By Index vs LCS vs UnorderedA hands-on comparison of the three JSON array diff methods — By Index, LCS, and Unordered — with real inputs and exact diff outputs. See how each handles insertions, reordering, in-place edits, and duplicates, plus their performance costs and trade-offs.Oct 3, 2026 · 5 min read