HIM fzn0x

Common Tools for development in Mac

`xcode-select`

version

xcode-select --version
// xcode-select version 2392.

Install

Do not use forEach with async-await

TLDR: Use for...of instead of forEach() in asynchronous code.

For legacy browsers, use for(...;...;...) or [].reduce()

To execute the promises in parallel, use Promise.all([].map(...))

The problem

Array Iteration

https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu

This is a more precise version of the native setTimeout(). It uses the same parameters as setTimeout, but adds a third parameter "resolution" which defines how often (in ms) to check for the time that passed.

// alert after 5 seconds with an inaccuracy of 20 milliseconds
var timeout = setExactTimeout(function(){
   alert('done');
}, 5000, 20);

// comment out to show "done"
clearExactTimeout(timeout);

	/**
	* Example `FizzBuzz` with JavaScript (Pattern-Matching Like????????????) λ_(ツ)_/¯
	* I Love this tweet
	* @see https://twitter.com/cajuinaoverflow/status/1395022027204005889
	* JavaScript will make You Crazy (Trust Me!)
	*/
	const FizzBuzz = n => ({
	true: n,
	[ n % 5 === 0]: "Buzz",
	[ n % 3 === 0]: "Fizz",

	/**
	* Sets up a DOM MutationObserver that watches for elements using undefined CSS
	* class names. Performance should be pretty good, but it's probably best to
	* avoid using this in production.
	*
	* Usage:
	*
	* import cssCheck from './checkForUndefinedCSSClasses.js'
	*
	* // Call before DOM renders (e.g. in <HEAD> or prior to React.render())

	'use strict';

	/**
	* @callback BeforeShutdownListener
	* @param {string} [signalOrEvent] The exit signal or event name received on the process.
	*/

	/**
	* System signals the app will listen to initiate shutdown.
	* @const {string[]}

	[
	{
	"id": "259392830932254721",
	"name": "SpeedRunners",
	"icon": "cb48279ea90e86fb4f71c709d3236395",
	"splash": "94e91cac9509fee1eb80a69b9503878a",
	"overlay": false,
	"overlayWarn": false,
	"overlayCompatibilityHook": false,
	"aliases": [],

	// exemple based on https://github.com/diafygi/webcrypto-examples#rsa-oaep

	function importKey() {
	return window.crypto.subtle.importKey(
	"jwk", //can be "jwk" or "raw"
	{ //this is an example jwk key, "raw" would be an ArrayBuffer
	kty: "oct",
	k: "Y0zt37HgOx-BY7SQjYVmrqhPkO44Ii2Jcb9yydUDPfE",
	alg: "A256GCM",
	ext: true,

	package goddrinksjava;

	/**
	* The program GodDrinksJava implements an application that
	* creates an empty simulated world with no meaning or purpose.
	*
	* @author momocashew
	* @lyrics hibiyasleep
	*/