- Create ./website directory
- Add a sitemap to wpcarro.dev
- Move covid-uk directory to sandbox directory
TODO: Next sandbox, blog, and learn in the website directory
Right now my website is serving at sandbox.wpcarro.dev, but I would rather
people view it at sandbox.wpcarro.dev/covid-19.
I previously tried to accomplish this with the following Nginx configuration:
```nix
locations."/covid-19" = {
root = briefcase.covid-uk;
}
```
I am now trying `alias = ...` instead of `root = ...`. I got the idea from this
SO question, https://stackoverflow.com/questions/10631933/nginx-static-file-serving-confusion-with-root-alias.
- Prefer hosting on sandbox.wpcarro.dev; I would prefer to host it at
sandbox.wpcarro.dev/covid-19, but I haven't figure out how to use Nginx to do
serve locations like /covid-19 yet.
- Splice the src directory: When I develop locally and index.html exists within
./src, I cannot access ./node_modules because ./node_modules is in a parent
directory. I could fix this if I used a bundler like Parcel or Webpack, but I
do not want to set that up at this time.
- Introduce Tailwind for CSS. This complicates my build a bit as well. For now,
I'm including output.css even though ideally I should not version-control this
file. I haven't figured out how to `yarn install` and run commands like `npx
tailwindcss build styles.css -o output.css` in a Nix derivation yet. Hopefully
I will learn and refactor this.
- Add some content about why I made this chart
- Add some content about some of my covid-19 predictions
- Add a footer to the webpage
- Delete timeseries.json and prefer fetching the published data instead
I was having trouble tracking the growth of corona virus cases in the UK.
Thankfully someone is publishing some daily COVID data as JSON. I downloaded
that data manually and plotted it using the chart.js library as a programming
exercise with Mimi.
Now I'm attempting to deploy to https://wpcarro.dev/covid-uk.
TODO(wpcarro): Prefer the live API data instead my soon-to-be-stale downloaded.
After some toil, I finally support basic ReasonML starter code.
I'm adding it to the nut-score directory because I would like to make a simple
webpage that render some nutritional facts about nuts with respect to the
ketogenic diet.
I'm not sure if I should include or exclude te .bs.js files.
See the README.md for more information.
It has been awhile since I have written a tutorial. I have spent 2-3 hours
working on this post, but I think I need to spend another 2-3 hours before I
publish it.
I expect to be able to write these posts faster as I practice.
I would like to create a few resources that I can reuse in each article for
things like:
- "Let's Learn Nix" reproducibility: Where I list all of the tutorials'
dependencies: nix version, <nixpkgs> version, OS type and version, etc.
- Haskell type signature convention for Nix
- Ad hoc vs. declarative configuration for Nix
- Troubleshooting Nix: <nixpkgs> search, nix repl, searching the Nix codebase
Nix home-manager generates an .xsession file for me. I believe there are a few
files for managing X-sessions:
- .xinitrc
- .xsession
- .xsessionrc: Only exists on Debian systems, which is why home-manager
generates an .xsession file instead. gLinux is a Debian system.
Whenever I close Emacs, another Emacs initializes. I believe this is because
after I allowed home-manager to manage my X-sessions, I unintentionally
supported two X-session configuration files: .xsession and .xsessionrc; both of
these files initialize Emacs.
I'm deleting my .xsessionrc, and I'm hoping that will remove the issue.
Enable autorandr with Nix home-manager. I discovered autorandr when looking
through the home-manager source code. I was hoping it would automatically
enable/disable my external monitor when I connect/disconnect my HDMI cable, but
it doesn't.
With autorandr, I run...
```shell
> autorandr --load mobile
```
...to load my randr settings for just my laptop without the external monitor,
and I run...
```shell
> autorandr --load docked
```
...to load my randr settings for my external monitor.
I'm not sure if this brings much more value than my existing display.el module,
but I'm willing to try it for now.
Return a function that returns the second largest item in a binary search
tree (i.e. BST).
A BST is a tree where each node has no more than two children (i.e. one left
child and one right child). All of the values in a BST's left subtree must be
less than the value of the root node; all of the values in a BST's right subtree
must be greater than the value of the root node; both left and right subtrees
must also be BSTs themselves.
I solved this problem thrice -- improving the performance profile each time. The
final solution has a runtime complexity of O(n) and a spacetime complexity of
O(1).
Write a function that returns true if a given binary tree is a valid binary
search tree (i.e. if all of root's left nodes are less than root.value, all of
root's right nodes are greater than root.value, and both left and right subtrees
are also valid binary search trees).
Write a predicate for determining if a binary tree is "super balanced", which
means that the depths of all of the tree's leaves are equal or differ by at most
one.
I wrongfully assumed that the relationship between a question and a question
category was one-to-one; it is actually one-to-many. This explains why I
completed the "Cafe Order Checker" and "Top Scores" questions twice.
I'm marking the questions that I've completed as DONE because I would prefer to
do every question once and then prioritize repeating the questions with which I
experienced difficulty.
From what I understand, gLinux and Nix are sometimes compatible and sometimes
incompatible.
Some nix-installed programs rely on system state that differs from gLinux's
system state. In other cases, Google wraps existing programs (e.g. git) to
provide Google-specific configuration.
Ever since I switched to home-manager and set `programs.git.enable = true`,
magit, which uses the git that PATH exposes hasn't been able to push, fetch, and
a few other commands.
TODO(wpcarro): Define a base home.nix that my gLinux and NixOS machines can
extend.
Write a function to sort a list of scores for a game in linear time. While I had
previously solved this in python, I hadn't marked the todo.org file, so I ended
up doing this again.
"Perfect practice makes perfect."
Get all pstree outputs for a given process name.
Usage:
```fish
> ptree ssh-agent
```
I'm unsure if I like home-managers; I'd prefer defining this functions in a
functions.fish file for a few reasons:
- I like syntax highlighting.
- home-manager compiles this into poorly formatted fish code.
For two days I tried using gpg-agent to emulate ssh-agent, but it did not work
the same way as ssh-agent. For example, gcert stopped working. Also, when I
tried adding keys to ~/.gnupg/sshcontrol using `ssh-add ~/.ssh/id_rsa`, the
command failed.
While the concept of reusing gpg-agent for ssh-agent appeals to me...
- Fewer agent processes
- pinentry support
...in practice, it fell short of my expectations. Some or all of this may be
because I tried running this on a gLinux machine.
- caffeine.md: an explanation of my theory that caffeine antagonizes
mindfulness.
- nix-and-hugo.md: a short tutorial explaining how I use Nix, the package
manager and Hugo, the static site generator, to host my blog.
- self-hosting.md: explain how I installed NixOS on my used Acer laptop.
I removed the startup code from .profile. I also depend on a fork of
home-manager until I submit my PR from wpcarro/home-manager into
rycee/home-manager.
redshift didn't properly work because it couldn't read the DISPLAY environment
variable. I can fix this ad-hoc with `systemctl --user import-environment
DISPLAY`, but home-manager will do this automatically if I allow it to manage my
xsession.
I think I removed the `(server-start)` call when I was debugging some EXWM
issues. I have stabilized my configuration considerably since then, and I'd like
to use the Emacs server.
I'm not doing enough Rust development to justify supporting this. I'm also in
the midst of a cleaning frenzy, so it's possible that this is just collateral
damage. I don't think it is because I can always use lorri to set this value
when I'm writing Rust (hopefully the second 1/2 of this year).
If you haven't noticed, home-manager is managing increasingly more of my
configuration.
- Migrate session variables to home.nix
- Drop support for unused session variables like TERMINAL, VISUAL
TIL: gpg-agent sets the SSH_AUTH_SOCK and other values. Since I already use
home-manager to start gpg-agent and SSH has been functioning without issues, I'm
removing the obsolete ssh-agent code.
Write a function that finds one duplicate number from a list of numbers 1..n.
The function should satisfy the following performance objectives:
Runtime complexity: O(n*log(n))
Space complexity: O(1)
