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// Great explanation https://bost.ocks.org/mike/shuffle/
// This relies on mutation. Could the algorithm be recreated using immutable data?
function shuffle(array) {
  var count = array.length
  while (count) {
    const current = count - 1
    // exchange current card with a random card below the current card
    swapIndices(array, current, Math.floor(Math.random() * current))
    // decrement count
    count = count - 1

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@startuml
  ' Basic styles that improve on defaults
  skinparam BackgroundColor Bisque
  skinparam NoteBorderColor DeepSkyBlue
  skinparam ArrowColor Navy
  skinparam Default {
    FontName Consolas
    FontSize 16
  }
  skinparam Title {

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// from this excellent tutorial on decorators: 
// https://javascript.info/call-apply-decorators

let worker = {
  slow(min, max) {
    alert(`Called with ${min},${max}`);
    return min + max;
  }
};

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export default class PersistentObject {
  constructor(name, contents) {
    this._validateContents(contents);
    this.name = name;
    this.contents = contents;
  }
  
  set(contents) {
    this.contents = { ...contents };
    localStorage.setItem(this.name, this.contents);

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// Identity functor
const Box = x => ({
  map: f => Box(f(x)),
  fold: f => f(x),
  inspect: () => `Box(${x})`
});

// const Either = Right || Left

const Right = x => ({

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function nums(n = 1) {
  return { first: n, rest: () => nums(n + 1) };
}

nums().first;  // => 1

function take(stream, n) {
  if (n <= 0) return [];
  else {
    const { first, rest } = stream();

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function reverseList(input, accumulator) {
  var reversed = { 
    id: input.id, 
    next: accumulator || null 
  };
  return input.next 
    ? reverseList(input.next, reversed) 
    : reversed;
}

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{
    "atomKeymap.promptV3Features": true,
    "editor.multiCursorModifier": "ctrlCmd",
    "editor.fontSize": 18,
   
    "editor.lineHeight": 22,
    "editor.fontWeight": "300",
    "editor.fontFamily": "Iosevka",
    // "editor.fontFamily": "Office Code Pro Medium",
    //"editor.fontFamily": "Office Code Pro",

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var crypto = require('crypto');

const CRYPTO_KEY = 'ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ'; // Must be 256 bytes (32 characters)

const message = `I see a little silhouetto of a man, 
Scaramouch, scaramouch will you do the fandango, 
Thunderbolt and lightning very very frightening me, 
Gallileo, Gallileo, 
Gallileo, Gallileo, 
Gallileo Figaro - magnifico`

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function decrypt(text) {
  const [ivStr, encodedStr] = text.split(':')
  const initVector = new Buffer(ivStr, 'base64');
  const decipher = crypto.createDecipheriv(
    'aes-256-cbc', CRYPTO_KEY, initVector
  );
  const encrypted = new Buffer(encodedStr, 'base64');
  let decrypted = Buffer.concat(
    [decipher.update(encrypted), decipher.final()]
  );