Jon Randy jonrandy

## basic_html5_template.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Basic HTML5 Template</title>
  <link href="stylesheets/style.css" rel="stylesheet" type="text/css" media="screen" />
  <script src="example.js"></script>
</head>
<body>

## programming-as-theory-building.md

      
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                jonrandy
                / programming-as-theory-building.md
            
            
              Created
              June 7, 2020 07:08
                — forked from onlurking/programming-as-theory-building.md
            
              
                Programming as Theory Building - Peter Naur
              
          
    Programming as Theory Building

Peter Naur


Peter Naur's classic 1985 essay "Programming as Theory Building" argues that
a program is not its source code. A program is a shared mental
construct (he uses the word theory) that lives in the minds of the people who
work on it. If you lose the people, you lose the program. The code is merely a
written representation of the program, and it's lossy, so you can't reconstruct


## load_images.js
function loadImage(url) {
  return new Promise((resolve, reject) => {
    let img = new Image();
    img.addEventListener('load', e => resolve(img));
    img.addEventListener('error', () => {
      reject(new Error(`Failed to load image's URL: ${url}`));
    });
    img.src = url;
  });
}

## decorate.js
// function decorating in JS

function ___(wrapper) {
    return function wrap(f) {
      let a = { [f.name] : function(...args) {return wrapper.call(this, f, ...args)} }
      return this[f.name] = a[f.name]
    }
}

function $__(inner) {

## zxspec-y.js
// Speccy memory addresses for y-coords on screen (first byte)

let list = [], third, midblock, fine, i;

for (i=0;i<192;i++) {
  third =  i&192 ;
  midblock = (i&56)>>3 ;
  fine = (i&7)<<3 ;
  list.push(midblock+third+fine)
}

## getFlagEmoji.js
const getFlagEmoji = countryCode=>String.fromCodePoint(...[...countryCode.toUpperCase()].map(x=>0x1f1a5+x.charCodeAt(0)))

## numberSpread.js
Number.prototype[Symbol.iterator] = function* () {
  for (let i = 1; i <= this; i++) yield i
}

[...5] // [1,2,3,4,5]

## knees.md

      
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                jonrandy
                / knees.md
            
            
              Created
              November 23, 2021 10:07
            
          
## isValidCSSColour.js
const isValidCSSColour = str => {
  const s = new Option().style
  s.color = str
  return s.color != ''
}

## isPrimeRegex.js
const isPrime = x=>!'1'.repeat(x).match(/^1?$|^(11+?)\1+$/)
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Basic HTML5 Template</title>
	<link href="stylesheets/style.css" rel="stylesheet" type="text/css" media="screen" />
	<script src="example.js"></script>
	</head>
	<body>
	function loadImage(url) {
	return new Promise((resolve, reject) => {
	let img = new Image();
	img.addEventListener('load', e => resolve(img));
	img.addEventListener('error', () => {
	reject(new Error(`Failed to load image's URL: ${url}`));
	});
	img.src = url;
	});
	}
	// function decorating in JS

	function ___(wrapper) {
	return function wrap(f) {
	let a = { [f.name] : function(...args) {return wrapper.call(this, f, ...args)} }
	return this[f.name] = a[f.name]
	}
	}

	function $__(inner) {
	// Speccy memory addresses for y-coords on screen (first byte)

	let list = [], third, midblock, fine, i;

	for (i=0;i<192;i++) {
	third = i&192 ;
	midblock = (i&56)>>3 ;
	fine = (i&7)<<3 ;
	list.push(midblock+third+fine)
	}
	Number.prototype[Symbol.iterator] = function* () {
	for (let i = 1; i <= this; i++) yield i
	}

	[...5] // [1,2,3,4,5]
	const isValidCSSColour = str => {
	const s = new Option().style
	s.color = str
	return s.color != ''
	}