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Comparison of two text files: what and where were the changes made?

Imagine that you have 2 texfiles (let's say 500kB - 3 MB big): the first original, the second is an update of this original. How can I find out what has been changed (inserted, deleted) and where the changes occurred (in the update file compared to the original)?

  • Is there any tool or library?
  • Saves this function in any well-known text editors?
  • Does anyone know the algorithm? Or what are the common methods for solving it on a large scale?
  • What would you do if you encountered such a problem?

Thanx for your ideas ...

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6 answers

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