evanrelf

-- Semigroup

(<|^.^|>) :: Semigroup a => a -> a -> a
(<|^.^|>) = (<>)
infixr 6 <|^.^|>

-- Functor

(<|$.$|>) :: Functor f => (a -> b) -> f a -> f b
(<|$.$|>) = (<$>)

evanrelf

let
  pkgs = import <nixpkgs> { };

in
pkgs.writeShellScript "doi" ''
  cat <<EOF
  When in the Course of human events it becomes necessary for one people to
  dissolve the political bands which have connected them with another and to
  assume among the powers of the earth, the separate and equal station to which
  the Laws of Nature and of Nature's God entitle them, a decent respect to the

evanrelf

#!/usr/bin/env nix-shell
#!nix-shell --packages youtube-dl ffmpeg moreutils -i bash
# shellcheck shell=bash

set -euo pipefail

main() {

if [ ! -d ~/.local/share/monty-python ]; then
  echo "Creating directory '~/.local/share/monty-python'" >&2

evanrelf

-- error:
--    Functional dependencies conflict between instance declarations:
--      instance Exception e => ToError e Error
--      instance Exception e => ToError (Either e a) (Either Error a)

data Error = Error
  deriving stock Show
  deriving anyclass Exception

class ToError i o | i -> o where

evanrelf

use std::{
    any::{Any, TypeId},
    collections::HashMap,
};

#[derive(Default)]
pub struct TypeMap {
    hash_map: HashMap<TypeId, Box<dyn Any>>,
}

evanrelf

{-# LANGUAGE LambdaCase #-}

{-# OPTIONS_GHC -Wall #-}
{-# OPTIONS_GHC -Wcompat #-}
{-# OPTIONS_GHC -Werror=incomplete-record-updates #-}
{-# OPTIONS_GHC -Werror=incomplete-uni-patterns #-}
{-# OPTIONS_GHC -Werror=missing-fields #-}
{-# OPTIONS_GHC -Werror=partial-fields #-}
{-# OPTIONS_GHC -Widentities #-}
{-# OPTIONS_GHC -Wmissing-home-modules #-}

evanrelf

{-# LANGUAGE BlockArguments #-}
{-# LANGUAGE LambdaCase #-}

{-# OPTIONS_GHC -Wall #-}

module Cont where

import Control.Monad.Trans.Cont (Cont, runCont)

data Tree a

evanrelf

let
  nixpkgs = builtins.fetchGit {
    url = "https://github.com/NixOS/nixpkgs.git";
    rev = "6f643a1098b30b060e7f719f84c8a7f9677d1c36";
  };

  pkgs = import nixpkgs { };

in
pkgs.mkShell {

evanrelf

1. Create a directory and cd into it

2. Copy index.html and main.js into the directory

3. Run this command to start a web server

   python3 -m http.server 8080

evanrelf

const fib = n => n == 0 ? 0 : n == 1 ? 1 : fib(n - 2) + fib(n - 1);
const fibs = [...Array(10).keys()].map(fib);
console.log(fibs);