Git - Reapply changes that were accidentally rollback

Here is the scenario

I made some changes and commit the file

I accidentally undo the change in my editor then made some more changes and commit

Now I realized the first change has been rollback.

Here is what I did

Find the finger print of my first change  a6dfb30, and find the original finger print  7c54b25, use the following command to generate the patch file

git diff  7c54b25 a6dfb30 -- src/app/dashboard/dashboard.component.html > 1.patch

Then apply the patch

git apply 1.patch

Done

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Feng