James Browning Jamesernator

`Array<T>`

Array<T>.prototype.*

concat(: (T | Array<T>)[]): T[]
concat(items) 🔒
- Returns a new array that is the concatenation of this and all items. Non-array parameters are treated as if they were arrays with single elements.
- ES3
- ['a'].concat('b', ['c', 'd']) → [ 'a', 'b', 'c', 'd' ]
copyWithin(:number, :number, ?:number): this

See this comment for a revised version.

Harden - Fixing the override mistake

The override mistake

The override mistake is a problem introduced with ES5's ability to mark properties as non-writable. When a property on the prototype of an object is marked non-writable, it makes the property unaddable on the object.

Blues

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	Boris the Spider
	Swamp
	Dry County
	White Lightning
	Murder By Numbers
	Dreadmonboogaloo
	Expresso Love
	Lizard Life
	Fuzzbox Voodoo
	Makin' Thunderbirds

	async def yieldfromexample():
	RESULT = yield from EXPR

	# Would become
	async def yieldfromexample():
	_i = aiter(EXPR)
	try:
	_y = await anext(_i)
	except StopAsyncIteration as _e:
	_r = _e.value

	async function drawCircles(mousedownEvent) {
	const { top, left } = theCanvas.getBoundingClientRect()
	for await (const clickEvent of clicks(theCanvas)) {
	const radius = Math.random() * 19 + 1 // Circles between 1-20 inclusive
	const color = randomColor()
	drawCircle(
	theCanvas,
	clickEvent.clientX - left,
	clickEvent.clientY - top,
	radius,

	export default async function doAbortable<R>(
	signal: AbortSignal \| undefined,
	func: (abortSignal: AbortSignal) => R \| Promise<R>,
	): Promise<R> {
	const controller = new AbortController();
	const abortInner = () => controller.abort();
	if (signal?.aborted) {
	abortInner();
	} else {
	signal?.addEventListener("abort", abortInner, { once: true });