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Programming in simple 4 steps
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this post was submitted on 25 Sep 2024
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Programming
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I spent like 3 hours yesterday deduplicating two functions that were hundreds of lines long and nearly identical. I should probably learn how to use that git command that can diff two files on disk. Luckily I actually enjoy cleaning up code sometimes.
If you're using a decent development system, you'll have an executable called
diffinstalled already :)That's what the
difftool is for.Dunno what OS's it supports besides Windows but I use Kdiff for random comparisons regularly, I think it works pretty well untill you get to much larger files (20+ MB slows down a lot). The huge file wasn't code but needed to check output changes for those curious.
I constantly check git comparison with previous versions to see what changed to break things in a build though. Didn't know there was a way to diff any files in git,should probably just learn to use that one.
Git uses the
diffbinary under the hood (unless you configure it to use something else).You can invoke that directly with
diff file_a.txt file_b.txt.git diff —no-index before.json after.json > showmethegoods.diffYou don’t have to save it to a file but I often do.
If you use VSCode, open both files and then ctrl-shift-P "Compare active file with ..."
You're welcome.
Thank you! I love VS Code
VS Code's diff tools are killer. Comparison is smarter than most, and you can edit either file as you go.
And if you want to avoid the Microsoft stank, there's VS Codium that has been de-Microsoft'd, like Chrome vs. Chromium.
You can use a diff app directly such as meld which is free. Highly recommend.