Arttu Pennanen pennane

pennane / fast git

Created January 29, 2026 12:26

	git config --global core.untrackedCache true &&
	git config --global core.fsmonitor true &&
	git config --global feature.manyFiles true &&
	git config --global core.preloadIndex true

	core.untrackedCache=true
	Caches untracked file info between commands
	core.fsmonitor=true
	Uses built-in filesystem monitor (watches for changes instead of scanning)
	feature.manyFiles=true

pennane / lentokonepeli ebnf

Created March 25, 2025 23:54

	map ::= map_name layer+ designer time_winner? EOF { ws=implicit }
	map_name ::= identifier
	layer ::= layer_id "=" layer_content
	layer_id ::= 'layer' digit+
	layer_content::= map_symbol*
	designer ::= 'designer=' identifier
	time_winner ::= 'time_winner=' ('allies' \| 'centrals' \| 'no')

	map_symbol ::= terrain_char \| special_symbol

pennane / 24_aoc_3.js

Last active December 14, 2024 13:03

	// All parsers take in a string and return a tuple of [token, remainingString]
	// If a parser fails to match, it should return null

	const any = (parsers) => (str) => {
	for (const parser of parsers) {
	const result = parser(str);
	if (result) return result;
	}
	return null;
	};

pennane / promise_all_limited_concurrency.ts

Last active July 15, 2024 07:48

	function promiseAllLimitedConcurrency<A, B>(
	maxConcurrency: number,
	f: (x: A) => Promise<B>,
	xs: A[]
	): Promise<
	[
	fulfilledValues: Array<PromiseFulfilledResult<B>['value']>,
	rejectedReasons: Array<PromiseRejectedResult['reason']>
	]
	> {

pennane / nested_promise_generator.ts

Created July 14, 2024 18:21

	type NestedGeneratorReturnType<T> = NestedGenerator<T> \| T
	type NestedGenerator<T> = Generator<Promise<NestedGeneratorReturnType<T>>>

	async function* collectNested<T>(gen: NestedGenerator<T>) {
	const pool = new Map<number, Promise<readonly [number, NestedGeneratorReturnType<T>]>>()
	let key = 0
	for (const p of gen) {
	const currentKey = key++
	pool.set(currentKey, p.then(v => [currentKey, v] as const))
	}

pennane / go_make_believe.ts

Last active July 13, 2024 10:45

	type TSettleResult<T> = [T, undefined] \| [undefined, Error];

	async function settle<T>(p: Promise<T>): Promise<TSettleResult<T>> {
	try {
	const x = await p;
	return [x, undefined];
	} catch (e) {
	return [undefined, e];
	}
	};

pennane / promise_race_all.ts

Created July 11, 2024 14:50

	type Pool<T> = Map<number, Promise<readonly [number, T]>>;

	async function* raceAll<T>(promises: Iterable<Promise<T>>): AsyncGenerator<T> {
	const pool: Pool<T> = new Map();

	let key = 0;
	for (const p of promises) {
	const _key = key;
	pool.set(
	_key,

pennane / markdown-details-collapsible.md

Created May 24, 2024 14:17 — forked from pierrejoubert73/markdown-details-collapsible.md

How to add a collapsible section in markdown.

How to add a collapsible section in markdown

Click me

pennane / parse_csv.js

Created May 23, 2024 09:44

parse csv file with ramda

	import * as R from 'ramda'

	const parse_csv_file = R.pipe(
	R.split('\n'),
	R.when(R.pipe(R.last, R.isEmpty), R.init),
	R.map(R.split(',')),
	R.converge(
	(headers: string[], rows: string[][]) => rows.map(R.zipObj(headers)),
	[R.head, R.tail]
	)

pennane / combinators.js

Created May 19, 2024 00:21 — forked from Avaq/combinators.js

Common combinators in JavaScript