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I'm assuming each revision is stored in the database, but what tools/libraries/technologies do they use to show the graphical diff?

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migrated from stackoverflow.com Sep 30 '10 at 19:34

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You should reword this so it's not a specific question about SO – DJ. Jun 3 '09 at 19:27
Yeah but I'm more curious about finding out what SO used than a general question about diff tools. – Jeremy Coenen Jun 3 '09 at 19:33
This question has been re-asked: meta.stackexchange.com/questions/66204/… – Pops Oct 1 '10 at 0:17

1 Answer 1

I am not sure about the GUI display but I am guessing it's custom and probably not that hard once you parse the diff output and apply styles to it.

The real work happens using a DIFFing engine which determines the difference between two blobs. There are quite a few .NET engines/library for determining the difference.

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