MikuroXina’s gists

MikuroXina / variable-expansion.sh

Last active October 1, 2023 09:50

MikuroXina / pairs.rs

Created September 9, 2022 12:48

Generate permutations on macro arguments in Rust.

	macro_rules! pairs {
	($macro:ident; $($items:literal),*) => {
	pairs!(@ $macro; $($items),; $($items),);
	};
	(@ $macro:ident; $x:literal; $($ys:literal),*) => {
	$(
	$macro!($x, $ys);
	)*
	};
	(@ $macro:ident; $x:literal, $($xs:literal),; $($ys:literal),) => {

MikuroXina / reducer.ts

Created August 15, 2022 08:55

The template for creating a custom reducer.

	export interface State {
	/* Type your state definition. */
	}

	export const initialState = (): State => ({
	/* Type your initial state. */
	});

	const reducers = {
	/* Type your reducer by key of the action name. */

MikuroXina / gen.ts

Last active September 4, 2022 02:45

Utility generator collection.

	function* empty<T>(): Generator<T, void> {}

	function* once<T>(elem: T): Generator<T, void> {
	yield elem;
	}

	function* onceWith<T>(fn: () => T): Generator<T, void> {
	yield fn();
	}

MikuroXina / tropical.rs

Last active July 28, 2022 07:56

Tropical semi-ring definition in Rust.

	use num::{One, Zero};
	use std::ops;

	#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
	pub enum Tropical {
	Value(u64),
	Infty,
	}

	impl Zero for Tropical {

MikuroXina / multi-curry.ts

Last active July 11, 2022 02:35

Currying manipulation for N-ary function.

	type Equal<X, Y> = (<T>() => T extends X ? 1 : 2) extends (<T>() => T extends Y ? 1 : 2) ? true : false;

	type Curried<F> = F extends (...args: infer A) => infer R
	? Equal<F, () => R> extends true
	? () => R
	: (A extends [infer F, ...infer S]
	? (arg: F) => Curried<(...rest: S) => R>
	: R
	)
	: never;

MikuroXina / divisors.rs

Created April 24, 2022 06:01

Divisors enumerator

	pub fn divisors(with: u64) -> Vec<u64> {
	assert_ne!(with, 0, "cannot find divisors with 0");
	let at_most = ((with as f64).sqrt() * 2.0).floor() as usize;
	let mut divs = Vec::with_capacity(at_most);
	for i in (1..)
	.filter(\|&i\| with % i == 0)
	.take_while(\|&i\| i * i <= with)
	{
	divs.push(i);
	if i * i != with {

MikuroXina / extract-env.ts

Last active July 27, 2022 14:55

Extraction of environmental variables for Node.js.

	/// 必要な環境変数名を可変長引数に渡すと, 環境変数ごとに対応した値が入ったオブジェクトを返す.
	///
	/// 対応した環境変数が定義されていない場合は `defaults` に設定した値へとフォールバックする.
	///
	/// # 例外
	///
	/// 対応した環境変数が定義されておらず `defaults` にも存在しない場合は例外を送出する.
	///
	/// # 使用例
	///

MikuroXina / binary_search.rs

Last active September 9, 2022 12:58

Binary-search with given function in Rust.

	use std::cmp::Ordering;

	pub fn binary_search(max: usize, mut f: impl FnMut(usize) -> Ordering) -> Result<usize, usize> {
	let mut left = 0;
	let mut right = max;
	while left < right {
	let mid = left + (right - left) / 2;
	match f(mid) {
	Ordering::Less => left = mid + 1,
	Ordering::Greater => right = mid - 1,

MikuroXina / ani2ico.rs

Last active October 26, 2022 12:13

The decomposer, converting the ani file to ico files.

	use std::{env, fs, io::Write, path::PathBuf};

	const ICON_MAGIC: &[u8] = b"icon";

	fn next_partition(buf: &[u8]) -> Option<usize> {
	buf.windows(ICON_MAGIC.len())
	.position(\|win\| win == ICON_MAGIC)
	}

	fn hoge() -> Result<(), Box<dyn std::error::Error + 'static>> {

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