Zack Young zaaack

So you want to write a sync system for a web app with offline and realtime support? Good luck. You might find the following resources useful.

Overview articles

Database in a browser, a spec (Stepan Parunashvili)

What problem are we trying to solve with a sync system?
The web of tomorrow (Nikita Prokopov)

In case anyone else wants to play with Zig on webassembly, here's what you need to do to make it work on a mac today.

1. Get LLVM 7 compiled with webassembly support.

You'll need LLVM to output to the WASM target. This has just been added by default in trunk, so if LLVM >7 is available, you might be able to just brew install llvm.

If you have wasm support already you should see:

$ llc --version

The evolutionary path is: monolithic backend-web-framework-based repo -> multi repos with shared infra -> monorepo contains shared infra

The tool support is becoming matured (Yarn Workspace, VSCode's Multi Root Workspaces)

[monorepo]/
 ├── universal-js-app project for product A/
 │    ├── node_modules/
 │    ├── common/

Phantom types in ReasonML

Introduction

"A phantom type is a parametrised type whose parameters do not all appear on the right-hand side of its definition..." Haskell Wiki, PhantomType

The following write-up is intended as an introduction into using phantom types in ReasonML.

Taking a look at the above definition from the Haskell wiki, it states that phantom types are parametrised types where not all parameters appear on the right-hand side. Let's try to see if we can implement a similar example as in said wiki.

In JavaScript, all binding declarations are instantiated when control flow enters the scope in which they appear. Legacy var and function declarations allow access to those bindings before the actual declaration, with a "value" of undefined. That legacy behavior is known as "hoisting". let and const binding declarations are also instantiated when control flow enters the scope in which they appear, with access prevented until the actual declaration is reached; this is called the Temporal Dead Zone. The TDZ exists to prevent the sort of bugs that legacy hoisting can create.

Install .NET Core on Debian Stretch

Execute the following :

sudo apt-get install curl libunwind8 gettext
curl -sSL -o dotnet.tar.gz https://go.microsoft.com/fwlink/?linkid=847105
sudo mkdir -p /opt/dotnet && sudo tar zxf dotnet.tar.gz -C /opt/dotnet
sudo ln -s /opt/dotnet/dotnet /usr/local/bin

	//知乎答案爬取
	var $ = document.querySelector.bind(document)
	var $$ = document.querySelectorAll.bind(document)
	var zh={
	Download:function (content, filename) {
	// 创建隐藏的可下载链接
	var eleLink = document.createElement('a');
	eleLink.download = filename;
	eleLink.style.display = 'none';
	// 字符内容转变成blob地址


	import * as React from "react";

	declare module "react" {
	function memo<P>(
	Component:React.SFC<P>,
	propsAreEqual?:((
	prevProps: Readonly<P & { children?: ReactNode }>,
	nextProps: Readonly<P & { children?: ReactNode }>
	)=>boolean

	#! /bin/bash
	### BEGIN INIT INFO
	# Provides: dns-sync
	# Required-Start:
	# Required-Stop:
	# Default-Start: S
	# Default-Stop:
	# Short-Description: Synchronizes /etc/resolv.conf in WLS with Windows DNS - Matthias Brooks
	### END INIT INFO

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>github</title>
	</head>
	<body>

	<script src="https://unpkg.com/[email protected]/lodash.js"></script>
	<script type="module">