Version Compare

[The Little Guy]

What would be a good way to do a version comparison, like how Wikipedia does it?

[requinix]

The best way would be to outsource the problem to something like Unix's diff (which undoubtedly has ports for other operating systems). Create two temporary files (if they aren't files already), run them through diff, and parse the output.

 

If you need to do it yourself then you should get familiar with the longest common subsequence algorithm.