markh's recent activity

Comment on Apple / iOS rant in ~tech
markh
September 11, 2021
Link
Well, I'll give a counterpoint here: accessibility features are so much better on iPhone/Apple devices that Android, Windows, and Linux shouldn't even be considered. These complaints also seem...

Well, I'll give a counterpoint here: accessibility features are so much better on iPhone/Apple devices that Android, Windows, and Linux shouldn't even be considered.

These complaints also seem very specific to you. I've had an iPhone for a decade now and I've never had a problem. It just works, and I love it for that exact reason.

9 votes

Comment on Day 6: Custom Customs in ~comp

markh

December 6, 2020

Link

Elixir! Took me a while to realize what part two was asking for. Parts One and Two defmodule Day6 do def one do File.read!("inputs/six.txt") |> String.split("\n\n") |> Enum.map(&String.replace(&1,...

Elixir! Took me a while to realize what part two was asking for.

Parts One and Two

defmodule Day6 do
  def one do
    File.read!("inputs/six.txt")
    |> String.split("\n\n")
    |> Enum.map(&String.replace(&1, "\n", "", global: true))
    |> Enum.map(&String.split(&1, "", trim: true))
    |> Enum.map(&MapSet.new(&1))
    |> Enum.map(&MapSet.size(&1))
    |> Enum.reduce(&(&1 + &2))
  end

  def two do
    File.read!("inputs/six.txt")
    |> String.split("\n\n")
    |> Enum.map(&String.split(&1, "\n", trim: true))
    |> Enum.map(&parse/1)
    |> Enum.map(&MapSet.size/1)
    |> Enum.reduce(&(&1 + &2))
  end

  def parse(input) do
    input
    |> Enum.map(&String.graphemes(&1))
    |> Enum.map(&MapSet.new(&1))
    |> Enum.reduce(&MapSet.intersection/2)
  end
end

4 votes

Comment on Day 5: Binary Boarding in ~comp

markh

December 5, 2020

Link

Day 5! This one was fun, although I had to figure out how to slide an array in Elixir. Elixir defmodule Day5 do def one do File.read!("inputs/five.txt") |> String.split("\n") |> Enum.map(&parse/1)...

Day 5! This one was fun, although I had to figure out how to slide an array in Elixir.

Elixir

    defmodule Day5 do
      def one do
        File.read!("inputs/five.txt")
        |> String.split("\n")
        |> Enum.map(&parse/1)
        |> Enum.max()
      end

      def parse(input) do
        [[r, s]] = Regex.scan(~r/([F|B]{7})([R|L]{3})/, input, capture: :all_but_first)

        row = r
        |> String.replace("F", "0")
        |> String.replace("B", "1")
        |> String.to_integer(2)

        seat = s
        |> String.replace("L", "0")
        |> String.replace("R", "1")
        |> String.to_integer(2)

        row * 8 + seat
      end

      def two do
        [[x, _]] = File.read!("inputs/five.txt")
        |> String.split("\n")
        |> Enum.map(&parse/1)
        |> Enum.sort()
        |> Enum.chunk_every(2, 1, :discard)
        |> Enum.filter(fn [x, y] -> y - x == 2 end)

        x + 1
      end
    end

4 votes

Comment on Day 4: Passport Processing in ~comp

markh

December 5, 2020

Link

Elixir, Day 4 Parts 1 and 2 defmodule Day4 do def one do File.read!("inputs/four.txt") |> String.split("\n\n") |> Enum.map(&parse/1) |> Enum.count(&valid_keys?/1) end def two do...

Elixir, Day 4

Parts 1 and 2

defmodule Day4 do
  def one do
    File.read!("inputs/four.txt")
    |> String.split("\n\n")
    |> Enum.map(&parse/1)
    |> Enum.count(&valid_keys?/1)
  end

  def two do
    File.read!("inputs/four.txt")
    |> String.split("\n\n")
    |> Enum.map(&parse/1)
    |> Enum.reject(fn x -> !(valid_keys?(x)) end)
    |> Enum.count(&valid_values?/1)
  end

  def parse(input) do
    input
    |> String.split(~r/\s+/, trim: true)
    |> Enum.map(&(String.split(&1, ":")))
    |> Enum.map(fn [k, v] -> {String.to_atom(k), v} end)
    |> Map.new()
  end

  def valid_keys?(data) do
    Enum.all?([:byr, :iyr, :eyr, :hgt, :hcl, :ecl, :pid], fn key -> Map.has_key?(data, key) end)
  end

  def valid_values?(data) do
    Enum.all?(data, fn {key, value} -> valid_value?(key, value) end)
  end


  def valid_value?(:hgt, value) do
    case Regex.scan(~r/(\d+)(\w+)/, value, capture: :all_but_first) do
      [[val, "cm"]] ->
        String.to_integer(val) in 150..193
      [[val, "in"]] ->
        String.to_integer(val) in 59..76
      _ ->
        false
    end
  end

  def valid_value?(:byr, value), do: String.to_integer(value) in 1920..2002
  def valid_value?(:iyr, value), do: String.to_integer(value) in 2010..2020
  def valid_value?(:eyr, value), do: String.to_integer(value) in 2020..2030
  def valid_value?(:hcl, value), do: Regex.match?(~r/#[0-9a-f]{6}/, value)
  def valid_value?(:ecl, value), do: value in ["amb", "blu", "brn", "gry", "grn", "hzl", "oth"]
  def valid_value?(:pid, value), do: Regex.match?(~r/^(\d){9}$/, value)
  def valid_value?(_, _), do: true
end

3 votes

Comment on <deleted topic> in ~tech
markh
July 8, 2020
Link Parent
Spectacle is the most important app on MacOS.

Spectacle is the most important app on MacOS.

1 vote
Comment on A Missouri bill intended to bar libraries from stocking “age-inappropriate sexual material” for children could land librarians who refuse to comply with it in jail in ~books
markh
January 17, 2020
Link
Of all the things to target, and with everything available freely on the internet, libraries are somehow an issue in 2020?

Of all the things to target, and with everything available freely on the internet, libraries are somehow an issue in 2020?

10 votes
Comment on What's your favourite live album? in ~music
markh
January 17, 2020
Link
Stevie Ray Vaughan - In The Beginning: https://open.spotify.com/album/5judWRJxX0B8BCohZDm69R John Mayer Trio - Try!: https://open.spotify.com/album/0X9bvQYYtrAYdkO4OKtYwz Vulfpeck - Live at...

Stevie Ray Vaughan - In The Beginning: https://open.spotify.com/album/5judWRJxX0B8BCohZDm69R

John Mayer Trio - Try!: https://open.spotify.com/album/0X9bvQYYtrAYdkO4OKtYwz

Vulfpeck - Live at Madison Square Garden: https://open.spotify.com/album/5KmXBjpN0wHutYBoDJBxmM

2 votes
Comment on Len Gon Give It To Ya (mashup of X Gon Give It To Ya by DMX with Steal My Sunshine by Len) in ~music
markh
January 13, 2020
Link
It’s as if someone made this specifically for me. Thank you for sharing this.

It’s as if someone made this specifically for me. Thank you for sharing this.

1 vote
Comment on What display theme do you use ? in ~talk
markh
January 11, 2020
Link Parent
One of us.

One of us.

1 vote
Comment on TV Tuesdays Free Talk in ~tv
markh
January 11, 2020
Link
I just started season three of The Handmaid’s Tale. Really dark show but it’s really good if you’re into that kind of thing.

I just started season three of The Handmaid’s Tale. Really dark show but it’s really good if you’re into that kind of thing.

2 votes
Comment on What are you reading these days? in ~books
markh
January 5, 2020
Link
I picked up On Writing by Stephen King and it’s been great so far. If you’re interested in learning more about King, his upbringing, his writing, or how to write in general, I recommend it.

I picked up On Writing by Stephen King and it’s been great so far. If you’re interested in learning more about King, his upbringing, his writing, or how to write in general, I recommend it.

1 vote
Comment on Fitness Weekly Discussion in ~health
markh
December 27, 2019
Link
Any recommendations for healthy pescatarian or vegetarian meal ideas?

Any recommendations for healthy pescatarian or vegetarian meal ideas?

2 votes
Comment on What programming/technical projects have you been working on? in ~comp
markh
December 26, 2019
Link Parent
Have you looked into Michael Hartl’s Rails Tutorial? It’s a really great, free resource for learning Rails and building a full project!

Have you looked into Michael Hartl’s Rails Tutorial? It’s a really great, free resource for learning Rails and building a full project!

1 vote
Comment on How to track President Trump (tracking of government employees using cell phones) in ~news
markh
December 25, 2019
Link Parent
Sure, but given that the technology already exists, it seems unlikely that even making it illegal is enough to deter those who really want it. Instead, I suggest we make it public. Really, really...

Sure, but given that the technology already exists, it seems unlikely that even making it illegal is enough to deter those who really want it.

Instead, I suggest we make it public. Really, really public. That’ll get people to care about who is tracking them. What’s the inverse of “out of sight, out of mind”?

1 vote
Comment on “Join Reddit to keep reading” - an account is now required to read comment threads on the mobile website in ~tech
markh
December 14, 2019
Link Parent
If they did, I’d stop using Reddit altogether. There are still some valuable communities on the site - niche programming, sports, and fitness communities come to mind - but Reddit as a whole isn’t...

If they did, I’d stop using Reddit altogether. There are still some valuable communities on the site - niche programming, sports, and fitness communities come to mind - but Reddit as a whole isn’t “cool” anymore, and it never will be ever again.

7 votes
Comment on What are your personal picks for "Games of the Decade"? in ~games
markh
December 13, 2019
Link Parent
To put this in perspective, if you worked 8 hours per day every single day - including Saturdays and Sundays - you would reach 3000 hours of work in 375 days, more than one year. That’s a lot of...

To put this in perspective, if you worked 8 hours per day every single day - including Saturdays and Sundays - you would reach 3000 hours of work in 375 days, more than one year. That’s a lot of time in a game.

2 votes
Comment on What games have you been playing, and what's your opinion on them? in ~games
markh
December 10, 2019
Link Parent
Haven’t started Banner Saga yet. Dark souls definitely needs to be played on a big screen. It was kind of giving me a headache when handheld, my best guess being that the textures are really hard...

Haven’t started Banner Saga yet. Dark souls definitely needs to be played on a big screen. It was kind of giving me a headache when handheld, my best guess being that the textures are really hard to distinguish from each other leaving a strange sense of confusion or maybe vertigo that I haven’t really experienced before. Maybe that’s just me, but I don’t ever get motion sickness, so I’m not entirely sure.

4 votes
Comment on What games have you been playing, and what's your opinion on them? in ~games
markh
December 9, 2019
Link
I bought Banner Saga and Dark Souls Remastered on Switch, so naturally I restarted Hollow Knight.

I bought Banner Saga and Dark Souls Remastered on Switch, so naturally I restarted Hollow Knight.

7 votes

Comment on Day 6: Universal Orbit Map in ~comp

markh

December 6, 2019

Link

I got a later start than I wanted to (by several hours), but this one was more fun and easier to understand than the previous day by a good amount. Part 1 const fs = require('fs'); const R =...

I got a later start than I wanted to (by several hours), but this one was more fun and easier to understand than the previous day by a good amount.

Part 1

const fs = require('fs');
const R = require('ramda');
const m = fs.readFileSync('input.txt').toString().split('\n')

// Generate nodes
const generateObjects = array => {
    const nodes = R.flatten(array.map(x => x.split(')')));
    const orbits = [...new Set([...nodes])].map(x => {
        return { node: x, children: [], parent: '' };
    });

    for (let i = 0; i < array.length; i++) {
        const [parent, child] = array[i].split(')');
    
        orbits.find(x => {
            if (x.node === parent) {
                x.children.push(child);
            } else if (x.node === child) {
                x.parent = parent;
            }
        });
    }

    return orbits;
}

// Takes an array of nodes and returns the total number of orbits
const findOrbits = array => {
    let orbits = 0;

    const recurse = (object, array) => {
        if (object.parent !== '') {
            orbits++;
            return recurse(array.find(x => x.node === object.parent), array);
        } else {
            return;
        }
    }

    array.forEach(x => recurse(x, array));

    return orbits;
}

const objects = generateObjects(m);
const totalOrbits = findOrbits(objects);
console.log(`Total orbits: ${totalOrbits}`);

Part 2

const fs = require('fs');
const R = require('ramda');
const m = fs.readFileSync('input.txt').toString().split('\n')

// Generate nodes
const generateObjects = array => {
    const nodes = R.flatten(array.map(x => x.split(')')));
    const orbits = [...new Set([...nodes])].map(x => {
        return { node: x, children: [], parent: '' };
    });

    for (let i = 0; i < array.length; i++) {
        const [parent, child] = array[i].split(')');
    
        orbits.find(x => {
            if (x.node === parent) {
                x.children.push(child);
            } else if (x.node === child) {
                x.parent = parent;
            }
        });
    }

    return orbits;
}

// Takes a node and returns an array of ordered nodes to root parent
const traverse = (node, array) => {
    let nodes = [];
    const index = array.findIndex(x => x.node === node);

    const recurse = (object, array) => {
        if (object.parent !== '') {
            nodes.push(object.node);
            return recurse(array.find(x => x.node === object.parent), array);
        } else {
            nodes.push(object.node);
        }
    }

    recurse(array[index], array);

    return nodes;
}

// Takes two points and an input and returns a distance
const findDistance = (a, b, input) => {
    const x = traverse(a, input);
    const y = traverse(b, input);
    const intersection = R.head(R.intersection(x, y));

    return [...x.slice(1, x.findIndex(x => x === intersection)), ...y.slice(1, y.findIndex(x => x === intersection)).reverse()].length;
}

const objects = generateObjects(m);
const distance = findDistance('SAN', 'YOU', objects);

console.log(`Minimum number of orbital transfers required: ${distance}`);

1 vote

Comment on Day 5: Sunny with a Chance of Asteroids in ~comp
markh
December 5, 2019
Link Parent
Love this and love Elixir. Great work!

Love this and love Elixir. Great work!

3 votes

markh's recent activity

Comment on Apple / iOS rant in ~tech

Comment on Day 6: Custom Customs in ~comp

Comment on Day 5: Binary Boarding in ~comp

Comment on Day 4: Passport Processing in ~comp

Comment on <deleted topic> in ~tech

Comment on A Missouri bill intended to bar libraries from stocking “age-inappropriate sexual material” for children could land librarians who refuse to comply with it in jail in ~books

Comment on What's your favourite live album? in ~music

Comment on Len Gon Give It To Ya (mashup of X Gon Give It To Ya by DMX with Steal My Sunshine by Len) in ~music

Comment on What display theme do you use ? in ~talk

Comment on TV Tuesdays Free Talk in ~tv

Comment on What are you reading these days? in ~books

Comment on Fitness Weekly Discussion in ~health

Comment on What programming/technical projects have you been working on? in ~comp

Comment on How to track President Trump (tracking of government employees using cell phones) in ~news

Comment on “Join Reddit to keep reading” - an account is now required to read comment threads on the mobile website in ~tech

Comment on What are your personal picks for "Games of the Decade"? in ~games

Comment on What games have you been playing, and what's your opinion on them? in ~games

Comment on What games have you been playing, and what's your opinion on them? in ~games

Comment on Day 6: Universal Orbit Map in ~comp

Comment on Day 5: Sunny with a Chance of Asteroids in ~comp