bolasblack’s gists

bolasblack / generate-btc-ordinal-addresses.ts

Last active May 18, 2023 13:36

	#!/usr/bin/env ts-node

	/**
	* Usage:
	*
	* pnpm ts-node scripts/generate-btc-ordinal-addresses.ts 'mainnet \| testnet' 'mnemonic' 0 1000 \| jq -r 'map(.address) \| join("\n")' > /save/to/some/file
	*/

	import { BIP32Factory } from 'bip32';
	import * as bip39 from 'bip39';

bolasblack / SafeEventEmitter.ts

Last active August 15, 2021 09:15

	type UnknownObject = Record<string, unknown>

	/**
	* 一个 EventEmitter ，当注册事件的对象（`gcTarget`）被 GC 时，会自动取消注册事件
	*
	* WARNING: 使用这个 EventEmitter 时需要注意，为了避免 `callback` 里可能会引用
	* `gcTarget` 导致 `gcTarget` 本身不被回收，所以代码实现中对 `callback` 是持有的弱引用，
	* 因此 `gcTarget` 本身需要持有 `callback` 的强引用
	*
	* @example

bolasblack / test.js

Last active April 17, 2020 03:57

break lines in html5 canvas

	import { textBreakLinesInCanvas } from "./textBreakLinesInCanvas"

	const maxWidth = 300
	const lineHeight = 24

	document.querySelectorAll('canvas').forEach((e) => e.remove())
	const canvas = document.createElement('canvas')
	canvas.width = maxWidth
	canvas.height = 300
	canvas.style.lineHeight = `${lineHeight}px`

bolasblack / launchd.plist.5.man.txt

Last active March 21, 2024 02:19

https://gist.github.com/6423ca4e67dbd35b6beff0b7dcc0ae02

	我的翻译内容基于 CC BY-NC-SA 3.0 协议
	https://creativecommons.org/licenses/by-nc-sa/3.0/cn/deed.zh

	launchd.plist(5) BSD File Formats Manual launchd.plist(5)

	NAME
	launchd.plist -- System wide and per-user daemon/agent configuration
	files
	launchd.plist -- 系统范围和用户级的守护进程/代理程序配置文件。

bolasblack / download latest singlefile yarn.sh

Created October 5, 2018 04:43

	# 1
	curl -o yarn -L `curl -s 'https://api.github.com/repos/yarnpkg/yarn/releases/latest' \| jq -r '.assets \| map(select(.name \| test("legacy.*js$")) \| .browser_download_url) \| .[0] \| tostring'` && chmod u+x yarn

	# 2
	VERSION=$(curl https://yarnpkg.com/latest-version)
	curl -L -o yarn https://github.com/yarnpkg/yarn/releases/download/v$VERSION/yarn-legacy-$VERSION.js

bolasblack / core.async vs Promise.md

Created October 5, 2018 04:39

Promise.race

const result = await Promise.race([promise1, promise2])

(go (let [[result chan] ;; result the value and while chan won
          (<! (alts! [chan1
 [value chan2] ;; even can wait a value &gt;! chan

bolasblack / bfcache-test.js

Last active September 19, 2018 08:24

how to prevent bfcache

	// modified from https://mixmax.com/blog/chrome-back-button-cache-no-store

	/**
	* Run this by downloading this script to your computer, then:
	* 1. $ npm install express
	* 2. $ node thisscript.js
	* 3. Open localhost:8030/nocache and then localhost:8030/nostore
	*/

	const app = require('express')()

bolasblack / 相对父元素宽度的字体块.html

Created December 16, 2017 14:26

	<html>
	<div style="width: 100px">
	<img src='data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 24 24"><text x="0" y="12" font-size="12">你好</text></svg>' style="width: 50%" />
	</div>
	</html>

bolasblack / rate_limit.clj

Created June 6, 2017 04:52

[limit concurrency operation with core.async]

	(def RATE_LIMIT 5)

	(defn operate [n]
	(println "test-operate" n (.now js/Date))
	(async/timeout 1000))

	(defn -test []
	(let [limit-chan (async/chan (- RATE_LIMIT 1))]
	(go (doseq [n (range 20)]
	(let [operate-chan (operate n)]

bolasblack / example.js

Last active May 18, 2017 08:02

[Wirte once algorithm for sync & async function]

	import co from 'co' // or whatever like co
	import fetch from './fetch_data_synchronously'
	import fetchAsync from './fetch_data_asynchronously'

	export function process() {
	const generator = processAlgorithmGenerator(fetch)
	let next = { done: false }
	while(!next.done) {
	next = generator.next(next.value)
	}