diff question

[Eric Cope]

Hi all,
I am trying to diff between two sets of files. I want to ignore comments
(lines that start with //).
I've tried

   - diff -I "//" file1 file2
   - diff -I "\/\/" file1 file2
   - diff -I "//.* file1 file2

among others. Has anyone successfully used diff and its ignore option?

Thanks,
Eric
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