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iahu / fft2.ts

Last active November 28, 2024 01:38

2D FFT

	import FFT from "fft.js";

	const getColumns = (d: number[][], cs: number[]) => {
	const res: number[] = [];
	for (let i = 0; i < d.length; ++i) {
	const r = d[i];
	res.push(...cs.map((x) => r[x]));
	}
	return res;
	};

iahu / pets.yaml

Created November 5, 2024 06:45

	# Taken from https://github.com/OAI/OpenAPI-Specification/blob/main/examples/v3.0/petstore.yaml

	openapi: "3.0.0"
	info:
	version: 1.0.0
	title: Swagger Petstore
	license:
	name: MIT
	servers:
	- url: https://petstore.swagger.io/v1

iahu / README.md

Created September 23, 2024 04:02

MacOS 词典正常使用维基百科的方法

使用 Shadowrocket 代理，并添加以下规则

DOMAIN-SUFFIX,lookup-api.apple.com,PROXY

iahu / get-image-data.ts

Last active September 10, 2024 07:03

color quantization

	export const getImageData = (image: HTMLImageElement) => {
	const canvas = document.createElement('canvas');
	const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
	const width = image.width;
	const height = image.height;

	if (width === 0 \|\| height === 0) throw new Error('image dimensions cannot be zero');

	canvas.width = width;
	canvas.height = height;

iahu / crypto-sha.js

Created July 20, 2023 04:45 — forked from chrisveness/crypto-sha.js

Uses the SubtleCrypto interface of the Web Cryptography API to hash a message using SHA-256.

	/**
	* Returns SHA-256 hash from supplied message.
	*
	* @param {String} message.
	* @returns {String} hash as hex string.
	*
	* @example
	* sha256('abc').then(hash => console.log(hash));
	* const hash = await sha256('abc');
	*/

iahu / cli.ts

Created September 9, 2021 06:29

获取图片主题色

	import fs from 'fs'
	import glob from 'glob'
	import cliProgress from 'cli-progress'
	import getThemeColor from './main'
	import ProHub from './prohub'

	const [path] = process.argv.slice(2)
	const bar = new cliProgress.SingleBar({}, cliProgress.Presets.shades_classic)

	glob(path, function (err, matches) {

iahu / magic-bytes.md

Last active June 8, 2021 06:05

iahu / magic-bytes.md

Last active June 5, 2025 08:25

magic bytes of media file type

iahu / promiseThrottle.ts

Created June 7, 2021 09:22

promise throttle

	type Job<T> = () => Promise<T>
	export const promiseThrottle = async <T>(
	jobs: Job<T>[],
	parallelCount: number,
	onParallelDone?: (results: T[], index: number) => void
	): Promise<T[]> => {
	if (!(jobs && Array.isArray(jobs))) {
	return Promise.reject('jobs must be Array')
	}

iahu / dsp-adx-price-decrypt.ts

Created May 31, 2021 02:45

DSP-ADX 价格解密逻辑 Typescript 版

	import * as crypto from 'crypto'

	const HMAC_ALGORITHM = 'HmacSHA1'
	const ekey = Buffer.from('9527')
	const ikey = Buffer.from('2840')

	const mergeBytes = (...args: Uint8Array[]) => {
	return Buffer.concat(args)
	}