AFuture AFutureD

WebAssembly 导学

提起 WebAssembly/Wasm 可能会想起它是一种可以在浏览器里运行 C/C++/Rust 的技术，实际上它是一个虚拟机标准，它的实现可以在 MCU（单片机）、移动设备、桌面电脑到服务器里面跑，可以嵌入到浏览器、嵌入到应用程序或者独立运行，没有具体的边界。

特点：

编译一次到处可运行（有点类似JVM虚拟机），源语言可以是 C/C++，Rust，Go，Swift ，TypeScript，C#，Kotlin 等等。
具体的功能依赖于导入的接口（Import API），否则只是一个单纯的运算器（栈式虚拟机）。目前接口主要有 Web JS 和 WASI 两种，前者用在浏览器里，后者可以作为独立应用程序（比如调用文件系统、socket 等）。
在 WASM 虚拟机里，只能调用宿主导入的方法和共享的内存，无法直接调用宿主的资源（比如 Web DOM 对象、文件系统等），所以天然具有沙盘安全特性。
性能很好，提供了接近本地程序的性能，同一段简单的 C 计算程序，以 WASM 方式运行大概慢 1 倍左右，相对一般动态语言慢几倍到上百倍来说，性能已非常突出。

DEPRECATED

This library is now deprecated in favour of a more complete and SwiftUI friendly TextEditor backport:

https://github.com/shaps80/SwiftUIBackports

See it in action here: https://twitter.com/shaps/status/1654972428286668800?s=20

How to install Zsh version 5.6.2 into CentOS 7

Given that you have a clean installation of CentOS 7 which was already updated, by you, then you still have some dependencies to install make and install the external Zsh from the source. You must be root to get the stuff done.

Install GCC Development Tools

yum groupinstall "Development tools"

Check if it's working

User timeline: https://m.weibo.cn/container/getIndex?type=uid&value={uid}&containerid=107603{uid}&page={pagenum} e.g. https://m.weibo.cn/container/getIndex?type=uid&value=3053424305&containerid=1076033053424305&page=1
Status details: https://m.weibo.cn/statuses/show?id={status_mid} e.g. https://m.weibo.cn/statuses/show?id=4154099588849643
Status comments: https://m.weibo.cn/api/comments/show?id={status_mid}&page={pagenum} e.g. https://m.weibo.cn/api/comments/show?id=4154099588849643&page=1
Status reposts: https://m.weibo.cn/api/statuses/repostTimeline?id={status_mid}&page={pagenum}

Disclaimer: I'm not the original author of this sheet, but can't recall where I found it. ~~If you know the author, please let me know so I give the attribution.~~

The original author seems to be Charles Edge, here's the original content, as pointed out by @percisely.

Note: Since this seems to be helpful to some people, I formatted it to improve readability of the original. Also, note that this is from 2016, many things may have changed, and I don't use macOS anymore, so I probably can't help in case of questions, but maybe someone else can.

Mac Network Commands Cheat Sheet

After writing up the presentation for MacSysAdmin in Sweden, I decided to go ahead and throw these into a quick cheat sheet for anyone who’d like to have them all in one place. Good luck out there, and s

I search a lot of questions and answers in SO. This is what i figure out. The result I want is map can zoom out to fit all/some annotations INCLUDE user's location.

The basic steps are:

Calculate the min lat/long
Calculate the max lat/long
Create CLLocation objects for these two points
Calculate distance between points
Create region using center point between points and distance converted to degrees

	const functions = require('firebase-functions');
	const TelegramBot = require('node-telegram-bot-api');

	const token = "***"
	const chatID = 1024 // your telegram id, you must first send a message to your bot

	exports.notifyIAP = functions.analytics.event('in_app_purchase').onLog((event) => {
	const purchaseValue = event.valueInUSD;
	if (purchaseValue > 0) {
	const bot = new TelegramBot(token, {polling: false});

	const MY_DOMAIN = "agodrich.com"
	const START_PAGE = "https://www.notion.so/gatsby-starter-notion-2c5e3d685aa341088d4cd8daca52fcc2"
	const DISQUS_SHORTNAME = "agodrich"

	addEventListener('fetch', event => {
	event.respondWith(fetchAndApply(event.request))
	})

	const corsHeaders = {
	"Access-Control-Allow-Origin": "*",

	# Platform: OS X
	#
	# Role: pull last repository changes, then build and run on a connected iOS device
	#
	# Usage: ./buildandrun-ios.sh [version] [--run-only]
	#
	# Parameters:
	# version version number (e.g. "v0.2", "v4rc3", etc.) for your Unity build name
	# --run-only set this if the Unity project was already build and you don't want to rebuild it
	#

	#include <bits/stdc++.h>
	using namespace std;

	int main() {
	int T; cin >> T;
	for (int _ = 0; _ < T; ++_ ) {
	int a, b, c, d;
	cin >> a >> b >> c >> d;
	cout << c << " " << b + d << endl;
	cout << a << " " << b + d << endl;