Arkham

# generate 100 random integers and store them in a file

STORE = "numbers.txt"

unless File.exists?(STORE)
  File.write(STORE, 100.times.map { Random.rand(10) }.join("\n"))
end

numbers = File.read(STORE).split("\n").map { |n| n.to_i }

Arkham

pub fn part_one(input: &str) -> Option<(Vec<Coords>, usize)> {
    let board = Board::from(input);

    run_dijkstra(
        &[board.start],
        |node| board.successors(node),
        |node| node == &board.end,
    )
}

Arkham

{ }:

let
  sources = import nix/sources.nix { };
  pkgs = import sources.nixpkgs { };

  darwinInputs = with pkgs;
    lib.optionals stdenv.isDarwin (with pkgs.darwin.apple_sdk.frameworks; [
      AppKit
      CoreFoundation

Arkham

let
  sources = import ./nix/sources.nix { };
  nixpkgs = import sources.nixpkgs { };
  nixpkgs-ruby267 = import sources.nixpkgs-ruby267 { };
in nixpkgs.mkShell {
  buildInputs = [
    nixpkgs.go
    nixpkgs-ruby267.ruby_2_6
  ];
}

Arkham

module MonadTrans where

import Control.Applicative (empty)
import Control.Monad (guard, join)
import Control.Monad.Trans.Class (lift)
import Control.Monad.Trans.Identity (IdentityT (..), runIdentityT)
import Control.Monad.Trans.Maybe (MaybeT (..))
import Control.Monad.Trans.Reader (Reader, ReaderT (..), ask)
import Data.List (intercalate)
import qualified Data.Map.Lazy as M

Arkham

module Robot where

robot (name, attack, hp) = \message -> message (name, attack, hp)

name (n, _, _) = n

attack (_, a, _) = a

hp (_, _, hp) = hp

Arkham

🏰 LambdUp Conf Prague

Philip Wadler - Categories for the Working Hacker

Product

type alias Person =

Arkham

🏰 LambdUp Conf Prague

Philip Wadler - Categories for the Working Hacker

Product

type alias Person =

Arkham

Lambda Calculus 🔬

A formal system for expressing computation in terms of function abstraction and application using variable binding and substitution

Invented in the 1930s by Alonzo Church. He was pals with Turing. Unsurprisingly, any problem which can be solved with a Turing machine can be solved with lambda calculus. Check out the aptly named Church-Turing thesis!

What is a function

f(1) = A

Arkham

module Main exposing (main)

import Html exposing (Html, text)


type Distance a
    = Distance Float


type Kilometer