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I'm not the author of the post, I just wrote the tool. I agree with you that it's not groundbreaking technology :-)

In fact, the code is extremely simple. As I mentioned in the README, I've used dc a lot and what I propose with clac is an improvement (for my taste) regarding the UI, as there's an always-visible representation of the stack that gets updated as you type. I recorded a short video to show it in action: http://files.soveran.com/misc/clac.mov

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I just want to say great work. The parent comment here didn't realize that you drastically improved the user experience by showing the stack, which I think makes all the difference here.

To make this clear, I would upload your video to gfycat and link the gif in your readme.

I just updated the README with a gif of that video. Thanks for the idea!

Just looked at the video, the 'as you type' updated stack info is actually pretty cool. I thought based on the description that it only printed the contents of the stack after a command was executed. This is much nicer.

You guys are right, I didn't realise it was this cool, and I was too quick to be cynical.

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