Thanks for the suggestion @hex7329. I do try using a null terminated string towards the end but couldn't get it to work. I'll have to re-watch the video and see what I missed.

And how is that possible that you have less than 50 subs lol

Glad I could help @Dandelionq.

@Endede glad you where able to figure out the number of steps for the Three Sort. I agree it was a big jump in difficulty, at least for me. I really miss having a higher level loop (e.g. a while or for loop). I wonder if my brain is so used to having the higher level programming features I can't solve problems without them? Feel free to share your solution either in the comments or a link a blog, video, etc.

@@saturdaymp Oh yeah, I can definitely relate to the higher-level handicap. I don't think that's anything to lament about, but I have the same impression. Low-level thinking is just different from working with abstractions that are multiple layers above. Anyways, here's my approach for beating the number of cycles challenge for Three Sort. As I said, there's no big trick, it's just a completely unspooled decision tree, so I really needed to keep those helpful sticky note comments in the code to be able to keep track of which state we're in. At least it's in proper in-game format this time. :D -- HUMAN RESOURCE MACHINE PROGRAM -- a: b: c: d: e: f: INBOX COPYTO 0 INBOX COPYTO 1 INBOX COPYTO 2 SUB 1 JUMPN i COMMENT 1 COPYFROM 1 SUB 0 JUMPN g COMMENT 4 COPYFROM 0 OUTBOX COPYFROM 1 OUTBOX COPYFROM 2 OUTBOX JUMP b g: COMMENT 5 COPYFROM 1 OUTBOX COPYFROM 2 SUB 0 JUMPN h COMMENT 7 COPYFROM 0 OUTBOX COPYFROM 2 OUTBOX JUMP c h: COMMENT 6 COPYFROM 2 OUTBOX COPYFROM 0 OUTBOX JUMP d i: COMMENT 0 COPYFROM 1 SUB 0 JUMPN k COMMENT 3 COPYFROM 2 SUB 0 JUMPN j COMMENT 9 COPYFROM 0 OUTBOX COPYFROM 2 OUTBOX COPYFROM 1 OUTBOX JUMP e j: COMMENT 8 COPYFROM 2 OUTBOX COPYFROM 0 OUTBOX COPYFROM 1 OUTBOX JUMP f k: COMMENT 2 COPYFROM 2 OUTBOX COPYFROM 1 OUTBOX COPYFROM 0 OUTBOX JUMP a DEFINE COMMENT 0 eJyTZGBgkIg86iwR+XlSSNSKHUAuw4Lc6QEy+dMDJhQ/iljb8Ccrtdm5YFUjT7lzReHE6PyuxSA1rv2X fD5PveTzbvo1f62ZSyK1ZnaVrpkR02Q6de/Mmkk+S9r7rq02nTp5ZfPyySsZRsEoGAWDFgAAYuss0A; DEFINE COMMENT 1 eJxTY2BgmBdmZDYv7OCcOeEBy4FchmXZ7sVXC1kKsxufR4t1Tvbt6m1yBImrZ1tn/ay2ztJuZMjj7o2o b+9L7QCJ85eodTpXqHXuqn7dk9C6d+asdpb5IPHARe6uZWs43N6v63JP23TJR2Xz9IDkzYXJ6psY8vLW X6qqW1k40X3Z3plXF3QtNl/TtkBwV9uCisNdi1+euLSCYRSMglFAFwAA11k/cw; DEFINE COMMENT 2 eJzTZWBgcDOY7HtJ+3v6Je3pdR367/sbjHZO+266d6aazd6ZcvalU/pdbjWweezNdvVIjRJ2FvRZZHvU ea1lk6ONibOTnfFR5wajSz5AYxjCI8968sae9bRKueY/tfBzSmPi9Lpj8bLNILnaqirr2qo/WdXVB+eA +P8mnnSzmHLSrW2Zfa7q7K7SLVN5ykHit7Y5O4nsdHby3hMT4rE3N8FjL0+5957ZjZd2avXc37J3ZtHR ulkMo2AUjAKqAQDQNUql; DEFINE COMMENT 3 eJwzZWBg2GQeE1JtYpTCZORd1mw4vY7JyHrGH+O2BRssJq9cZSW6erpjyCpvN5b5zp5aPfVeglWMXlWZ fK6PIoSd74XG2s8Ofm8xOxhoDMPt8JMlLQl/ssxTteL0MyICp0WeLNmQLtlwK1+tc0KxXj9ITUhU6ZSv qaVTUnL2zowsCFgOEuPoe23A0ReyCsTevSrAe+uaAO8j+1gKZbZNrrZZtXMaSDzoorfH4WveHla3rvmb 374XWn77c8q+G5eqXK89brt8gWHOzHNtC4zuti2QeeqzhGEUjIJRQDQAAGOhV9g; DEFINE COMMENT 4 eJxzYGBgUFeJCfmgoBW3U5alsFJ2RVe5nP1sI4WA5VrKkusS1WQ3hmjLbuzTlVzHYnhy0XfThNZN5iyF m8y3pH43zU34b7QiJkR7SSTQGIZ29+l1O32u1eYHCFbFhNvnzoz4ng4SD3CJaWLziGmy9U5o9YpzngcS O+PKMKfJk2X+kpAlW0F8vxIWZ7+So/O7SzN3gvV0sxQWTWMpvD1PLxHE7+k5mMc8oSnfdGpX6cz5im1M KyTXgcQvdq3o8ujL7GaekNvnv9j+JEgsYYtk0JF9kkF2B5dEVh3amVF16HGbwwH3hb27c/fM2N527t8B hlN6x+1P3j7rfp5hFIyCEQ4A7Z5iVw; DEFINE COMMENT 5 eJxzZGBgOKEfEdinW5XJr3upil/3z4xTel2L/xvd22hmlrptldWKHYp2z7eHOkmu83X1WdLuvmFCu3tA Za/r3mxpB7XoL2aTfVkMBX2AxjBoBN8Kig+7FdQTuySyJtkoZUN6U/7X1K7SxsTpdXPCq6aD1Pyp+mz2 pyq3r7r66HwQv35ialT5lCWRr2eI+l9dcNQZJGY7STFCY5ZixO15hckhCw/mdS85Vw4SZ57wJ2vfxLqc xbNTOyYv/DEVJHZ9+3tj5/3vjfcc/G5ZcbjJcdPR1CiDY+7FH48KVm05Itt8fO+5pTO2Z+6M2/p+752t r3dN2qm0Zf8ByXVJpyXXXTs/e33QxXsbGUbBKBjBAAALj3f9; DEFINE COMMENT 6 eJzTYGBgiA+bHawcOjtYO8goJTdwfot2UGrHvLDCif4xP6Y6Jf6YapWyZfK6jCXty7Ldi5dlG6WsyHoe /SE9InB3sreHe3yTY1TEXtv4sDo7oFEM/yvbXAK6teJa+kvT5reK1oLEttdkdj9vet45v1WxDcSfPa/O zn1ZnV3jCkGfxhVGKYeX780+uqytiH/x7MaZ81d0uS9b0ZW3fk1v2I4tkxlGwSgYBTQFAH7qRP8; DEFINE COMMENT 7 eJzTY2BgqPcS9NnoL+izPFg2VCHsc0p82NFCa5+EVg/3qun7vaxnbPE7OMcl4dIKoFKGvAxBH5l8QR/j utyE6R3uxWrN58qtq2WbJQty+0Dy1wtEVzdXiK42rPdZEtRlNpWvByL+fl2A96e1r+N+rZJs2L2Kd2nl 6skry9ZMX7NiY+Lm+1seb+nao7Sl6hDv0jXHN0zQOJna8ezk9LpnJ0+WaJysyyk9Mjv4z8FLPq37vD00 N3K47VgdE8IwCkbBKKAKAAAUc1Ic; DEFINE COMMENT 8 eJzTZWBgWB+gGFHqtyKm1ts6q97rXPl+r/f9VT72s5cHT18TFSG7sS5JdqN+RsDyxTk7p83NS+2Izncv ls+ry1HJMUv/kK6XaJ/0PPpGxPww3cD5YUDjGD7WPYp43vQoIrlFLXpWe2EyW79orVinWqdC65bJLxsP ztlaO30NSB3vkltBp5ckhLMv25t9Yqn1DP7FEWtj5q3ZfWO+3t5b23L3gNRkzSxMfjFzTXz83IRw0YXT A/wXX/NnGAWjYBRQDQAAtHZPQg; DEFINE COMMENT 9 eJwzZGBg2O4bE7LdN6G1yJ9l/sqgiLVLQmQ3hkcu2dqSsGTrjpT5m1ZkCa5QzHVfeDfPfvat/C2TZxRE 1EcW7M2+n7smPjMrIfxD+q0ghqRLPiFRXe4awSfddAO73C18Q/yARjMU17kXZze6F6s1sxRe6cyM5eib HQwSL6gPqNRsCqnZN5FlPohvXLd3pl6D/WyxzlvrQHz+xf1e7sv6vVyWC/o4rpAMsl+5JdV+5euexhXW M44u4116YZHadt4lK3bIbFPbzjAKRsEoIBsAAPGIUDs;

Thanks for possible solution @Endede. I am switching to recording some videos about upgrading a Rails application but will come back to Human Resource Machine in the future.

@@saturdaymp Looking forward to it!

@Endede I tired your solution and it worked! kzbin.info/www/bejne/mnPWaox6otqWiqs

@@saturdaymp Oh, that's awesome! Thanks for giving it another try!

Thanks for providing a possible solution @Endede. I tried implementing the solution in episode #27 but couldn't get it to work, likely my fault as I was short on time. I'll keep trying solutions as time permits, possibly off camera, and let you know if I find one that works. I'm trying really hard to not look up the solution on the Internet. kzbin.info/www/bejne/ppWleaqViKmNj8U

@@saturdaymp No no. Not at all your fault. I saw your follow up, and you're right, it doesn't work as is. I fixated on the two registers and forgot to double check the exit invariant, which should be to hold the SUM in your hand. It would be easy if we could COPY TO outbox, but I'm not sure that's possible. I'm invested now, so I'll think about it more. Maybe I have to get the game to be able to debug easier. Or write a simple interpreter?

@a11aaa11a that is a good question and the answer is: yes you can use an image in a docker-compose.yml file. You can test it yourself by creating a file that uses Docker's Hello-World image: services: hello: image: hello-world Then run `docker-compose run --rm hello`. It will download and run the Hello-World image. No Dockerfile needed. You can find another example in my Rails 6 template example at. This Docker Compose setup uses a Dockerfile for the website but a image for the database: github.com/saturdaymp-examples/rails-6.0-template/blob/master/docker-compose.yml Let me know if the above helps. All the best.

​@@saturdaymp ah sorry, I mean you can't use just an image _with compose watch_. This fails for me (as does adding a context without a dockerfile): services: hi: image: hello-world develop: watch: - action: rebuild path: "./" target: "/"

@@a11aaa11a you are correct, you can't use Docker Compose Watch without a Dockerfile. At least I couldn't get it to work in this video kzbin.info/www/bejne/ZmaupaStpMeLa7s. Thank you for clarifying your question and pointing out something I missed.

@parity99 I'm glad you found the video helpful. I have also run into the problem of having a Docker container run as a non-root user and not able access the volume on my local host. Specially running NGINX/Passenger. I briefly highlight how I got around that problem in the below video. Spoiler, I force NGINX to run as root in development. kzbin.info/www/bejne/fmrPi2VqbNR8ncU Let me know if the above was helpful and if not I can go into more detail about how I setup my website development environment. Many years ago I did try writing a script that would map the host and container users but wasn't able to get it to work reliably. How does your script work? Do you mind sharing it, or at least parts of it?

@saturdaymp I took a look at your video. The script I provided in my previous comment (I think? can't see it now) has a variable UNAME which may help; you could set it to nginx so that the nginx process assumes the user of the detected host bind mount volume. Also, have a look at envsubst which is included in the nginx image. Also, it may be easier to keep nginx in a separate container/service from the rails app; they can still communicate via reverse proxy tcp or via a shared unix socket on a volume, although I'm not a rails person so not sure if that's the recommended setup or not!

Thanks for trying to upload the script. My guess is KZbin didn't like your script and flagged it as spam or something worse. Also thanks for the envsubst command tip. Great minds think alike as I discovered that command a couple days ago used it for my NGINX config in currently unreleased videos. I didn't bother splitting up the Rails server and NGINX onto separate Docker containers as the SaturdayMP website is simple, small, and mostly static. No need to manage, and pay, for two Docker containers. That said, if you have a more complicated setup then setting up NGINX on a separate Docker container from your Rails, or other framework, server is a good idea.

@victorajayi9056 that is a good question. I said two-way sync in the video but Volumes are only "kind-of" a two way sync. Assume we have a Docker Compose below: ``` volumes: - .:/app ``` The above will overlay the host file at '.', which is the current directory the docker-compose.yml file is in, inside the container at `/app`. This will work if the `/app` does not exist in the container, the folder will be created and visible while the volume is mounted. Changes made in the `/app` folder inside the container will be reflected on the host and vice versa. When the volume is unmounted the container will unhide the `/app` folder on the container. The `/app` folder did not exist before the volume was mounted it will cease to exist when the volume is unmounted. If the `/app` folder did exist before the mount then the files in it will be reverted back to. For example, if `/app` in the container contains `file1.txt` that file will be hidden while the volume is mounted and will re-appear when the volume is unmounted. I attempt the explain the above in the below video: kzbin.info/www/bejne/pIvOiYSge7p8ndU Let me know if the above helped and ping me if you have any more questions.

Thank you for the kind words @estrelladeaurora6065 and I'm glad the video helped you. Feel free to ping me with any questions you have an I can try to answer them in a future episode.

Yes, I was attempting to get the RubyMine debugger working with Rails running in Docker. I had done it many times before but ran into issues in this video as there was a bug in RubyMine: youtrack.jetbrains.com/issue/RUBY-31246 The issue has now been fixed in RubyMine but my solution in the video was to download the preview version of RubyMine. Give me a shout if you have a specific question about getting RubyMine debugger to work with Docker.

Thanks for the question but I don't fully understand what you are asking. Can you provide a detailed example of the problem you are trying to solve?