dfkaye

// 11 May 2024
// chapter 8 Data oriented programming
// atomic value swap alg

function Atom (state) {
  return {
    state,
 
    atomicCompareAndSet(current, previous, next) {
      return current === previous ? (state = next, true) : false;

dfkaye

// 10 May 2024
// Not mine! The regexp is from a tweet by Kyle Simpson
// https://twitter.com/getifyX/status/1788895673821118886

var reEmailAddress = /^[^@]+@[^@.]+(?:\.[^@.]+)+$/;

["a@b.c", { toString: () => "a@b.c" }, ["a@b.c"]].map(email => reEmailAddress.test(email));

// Array(3) [ true, true, true ]

dfkaye

// 6 May 2024
// hex to rgb

// made you look

// originary defamatory statement
// https://twitter.com/the_moisrex/status/1787444601571221892

// uncomplicated, performs well enough (suite runs under 1ms).
// supports 3 or 6 character strings with or without leading octothorpe.

dfkaye

// 5 may 2024
// use queueMicrotask and friends to get away from IIFEs and semicolons


'use strict';


(function () {
  console.group("collision")
  try {

dfkaye

// 26 April 2024
// promise handler that returns promises as {value} or {error: {message}}
// structures - that is, a resolved promise with a value field, or a rejected
// promise with an error field that in turn contains a message field.

// goaded by Austin Gil's tweet 25 April 2024:
// https://twitter.com/heyAustinGil/status/1783622633000710321
// his solution, slightly modified...
/*
function IP(p) {

dfkaye

// 12-13 April 2024
// array queue

// first implementation uses a single array and deletes slots on "pull", while
// using "push" to append new items.

// second implementation uses a single array but uses "splice" for both "push"
// and "pull" commands, the benefit being we don't have to manage empty slots;
// however, splice results in the array indexes being shuffled internally...

dfkaye

// 3 December 2023
// How to create a custom setAttribute method on a non-DOM object
// and reflect the attribute as a property.

// 3 December
// Expanded by adding get and remove attribute methods.

// 21 March 2024
// Added hasAttribute method.
// Added logic to reflect a property as an attribute.

dfkaye

// 20 March 2024
// fake fetch iife closure test

// Twitter posed a question at
// https://twitter.com/jcubic/status/1770519375944040682

// So I answered. I've since been blocked. *shrug*

// Here's what I get with a fake fetch, F:

dfkaye

// 8 March 2024
// check that given value contains no values or is an empty array, string, object...

// from simplegraph repo 2014
// https://github.com/dfkaye/simplegraph/

// simpler than the is-empty.js gist 5 Jan 2018
// https://gist.github.com/dfkaye/f87272098c4e19e4d55a6a18515aefce

function empty(o) {

dfkaye

// 3 March 2024
// generate an XPath expression for an element in an HTML document

// ONLY WORKS FOR ELEMENTS SO FAR, NO FANCY NODE TYPE SELECTION YET

// for an element tree structure such as
// <a><b><c><d id="test"> this is <e> embedded </e> text </d></c></b></a>
// the XPath expression for window.test (id="test") should be
// //BODY[1]/A[1]/B[1]/C[1]/D[1]
// and passing that to document.evaluate() should return