Cyril Auburtin caub

Double vs Single quotes for JavaScript Strings

Newcomers will already be familiar with double quotes from their language. In English, we must use double quotes " to identify a passage of quoted text. If we were to use a single quote ', the reader may misinterpret it as a contraction. The other meaning of a passage of text surrounded by the ' indicates the 'colloquial' meaning. It makes sense to stay consistent with pre-existing languages, and this may likely ease the learning and interpretation of code.
Double quotes eliminate the need to escape apostrophes (as in contraptions). Consider the string: "I'm going to the mall", vs. the otherwise escaped version: 'I'm going to the mall'.
Double quotes mean a string. When you learn a new language like Java, Python, or C, double quotes are always used. This is because, as mentioned above, double quotes have always been used in language to indicate quoted passages of text. Old books will use double quo

Shortening const to something like ref, val, cst because
- it's the most frequently used keyword
- conflicts with console.log auto-completion
null should be Object.freeze(Object.create(null)) or a special Symbol.nullable
([] =~= []) // true shallow compare
({ a: {} } =*= { a: {} }) // true deep compare
~~Making function arguments flexible and coherent with arrays~~

	const { Readable } = require('stream');
	const ys = Buffer.from('y\n'.repeat(2**16));
	class Y extends Readable {
	_read(size) {
	this.push(ys.slice(0, size));
	}
	}
	new Y().pipe(process.stdout); // test with node yes \| pv -r > /dev/null

	// 2 globals defined at boot of nodejs engine
	rl = cb => require('readline').createInterface({input:process.stdin}).on('line',cb);
	print = console.log;

	/*
	Let's call an integer "repetitive" if it contains two of the same digit in a row. For example, 12232 is repetitive but 1232 is not.
	Given a positive integer n < 10^15, return the number of nonrepetitive integers in [1..n].
	*/
	// prog
	rl(s=>{r=0;d=s.length-1;for(i=0;i<=d;i++){r+=(i>0&&s[i-1]<s[i]?s[i]-1:s[i])9(d-i);if(s[i-1]==s[i]){r--;break}}for(i=0;i<d;i++)r+=9*i;print(r)})

	function $(container, selector) {
	const els =
	typeof selector === 'string'
	? container.querySelectorAll(selector)
	: typeof container === 'string' ? document.querySelectorAll(container) : [container];

	const fns = {
	removeClass(...cls) {
	els.forEach(el => {
	el.classList.remove(...cls);

	window.import = function (transformer) {
	const ROOT = location.origin;
	const REQUIRE_CACHE = new Map();
	const RE_EXT = /\.js\w*$/;

	function fqn(url, dirname) {
	const {href} = new URL(url.startsWith('http') ? url : (url.startsWith('/') ? ROOT : dirname) + url),
	last = href.lastIndexOf('/'), dir = href.slice(0, last+1), name = href.slice(last+1),
	filename = name ? (RE_EXT.test(name) ? name: name+'.js') : 'index.js';
	return {dir, abs: dir+filename};

	module.exports = function(gen) { // coroutine, equivalent to https://github.com/tj/co
	const it = gen();
	return Promise.resolve().then(function pump(v) {
	const next = it.next(v);
	if(next.done) return next.value;
	return Promise.resolve(next.value).then(pump, it.throw.bind(it));
	});
	};