ccnokes

# get the URL of the current Astronomy Picture of the Day (APOD)
apod_url=$(curl -s https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY | jq -r '.hdurl')

# get just the image name from the URL
filepath=$(basename "$apod_url")

# Now get the image and save it 
curl -s -o "$filepath" "$apod_url"

# Use AppleScript to set it as the wallpaper

ccnokes

// see demo: https://jsfiddle.net/ccnokes/6hb92mde/
class Deferred {
  constructor() {
    this.promise = new Promise((resolve, reject) => {
      this.resolve = resolve;
      this.reject = reject;
    });
    this.then = this.promise.then.bind(this.promise);
    this.catch = this.promise.catch.bind(this.promise);
  }

ccnokes

// see working demo here: https://jsfiddle.net/ccnokes/jhu635r8/73/

async function runTasks(taskFns /* Array<() => Promise<any>> */, concurrency = 3) {
  let results = [];
  taskFns = new Set(taskFns);
  let pending = new Set();
  for (let task of taskFns) {
    if (pending.size >= concurrency) {
      await Promise.race(pending);
    }

ccnokes

// dummy async task
function asyncTask(n) {
  return new Promise(resolve => setTimeout(() => resolve(n), 500));
}

// takes a flat array and returns a nested one, eg. chunkArray([1,2,3], 1) ==> [[1],[2],[3]]
function chunkArray(arr, chunkSize) {
  return arr.reduce((aggr, item) => {
    let lastArr = aggr[aggr.length - 1];
    if (lastArr.length < chunkSize) {

ccnokes

mkfifo fifo

# produce data and send into fifo
# have to background it because it blocks until the fifo drains/completes
ls -l > fifo &
cat fifo # this drains it and completes the job

ccnokes

class Deferred<T = any> {
  resolve: (value?: T | PromiseLike<T>) => void;
  reject: (reason?: any) => void;

  promise = new Promise<T>((resolve, reject) => {
    this.resolve = resolve;
    this.reject = reject;
  });

  then = this.promise.then.bind(this.promise);

ccnokes

// class version
class Queue {
  private p: Promise<any> = Promise.resolve();

  push<T = any>(fn: () => Promise<any>): Promise<T> {
    this.p = this.p
      .then(() => fn())
      .catch(err => {
        console.error(err);
        return fn(); //keep going to next queued

ccnokes

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "lib": ["es2017", "es7", "es6", "dom"],
    "declaration": true,
    "outDir": "dist",
    "strict": true,
    "esModuleInterop": true
  },

ccnokes

{
  "name": "my-ts-lib",
  "version": "1.0.0",
  "description": "My npm package written in TS",
  "main": "dist/index.js",
  "types": "dist/index.d.ts",
  "scripts": {
    "build": "tsc"
  },
  "author": "Cameron Nokes",

ccnokes

// find if number is even or odd
const isEven = val => val % 2 === 0;
isEven(11); //false
isEven(22); //true

// do time related things...
const formatMovieTime = val => {
  const hours = Math.floor(val / 60); //get the hours, discard any remainder via `floor`
  const mins = val % 60; //get the remainder of minutes left over as an integer
  return `${hours}:${mins < 10 ? '0' + mins : mins}`;