toricls

Lima (Linux virtual machines, on macOS) installation guide for M1 Mac.

Sep. 27th 2021 UPDATED

Now we can install patched version of QEMU via Homebrew (thank you everyone for the info!). Here is the updated instruction with it:

Used M1 Mac mini 2020 with macOS Big Sur Version 11.6.

1. Install QEMU & Lima

canbingzt

#!/bin/sh
hostip=$(cat /etc/resolv.conf | grep nameserver | awk '{ print $2 }')
wslip=$(hostname -I | awk '{print $1}')
port=<PORT>

PROXY_HTTP="http://${hostip}:${port}"

set_proxy(){
    export http_proxy="${PROXY_HTTP}"
    export HTTP_PROXY="${PROXY_HTTP}"

davx1992

/** UI element heights which used in message height calculation */
textPaddingVertical: number = 7;
textPaddingHorizontal: number = 10;
timeHeight: number = 12;
timeTopMargin: number = 5;
messageContainerVerticalMargin: number = 7;
dateSeperatorVerticalMargin: number = 20;
dateSeperatorHeight: number = 15;
imageHeight: number = 170;
imageBottomMargin: number = 10;

danielkcz

function useFormik(props) {
  // useState to keep the same observable around without recreating it on each render
  const [formik] = React.useState(() =>
    mobx.observable({
      values: props.initialValues || {},
      touched: {}
    })
  )

  // just mutate state, this function itself can be considered an action+reducer 

songouyang

sass_binary_site "https://npm.taobao.org/mirrors/node-sass/"
phantomjs_cdnurl "https://npm.taobao.org/mirrors/phantomjs/"
electron_mirror "https://npm.taobao.org/mirrors/electron/"
registry "https://registry.npm.taobao.org"

DimitryDushkin

// babel.config.js
module.exports = {
  "presets": [
    "module:metro-react-native-babel-preset",
  ],
  "plugins": [
    ["module-resolver", {
      "root": ["./src"],
      "extensions": [".js", ".ts", ".tsx", ".ios.js", ".android.js"]
    }],

fotock

# 生成 dhparam.pem 文件, 在命令行执行任一方法:

# 方法1: 很慢
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

# 方法2: 较快
# 与方法1无明显区别. 2048位也足够用, 4096更强
openssl dhparam -dsaparam -out /etc/nginx/ssl/dhparam.pem 4096

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

evantoli

Configure Git to use a proxy

In Brief

You may need to configure a proxy server if you're having trouble cloning or fetching from a remote repository or getting an error like unable to access '...' Couldn't resolve host '...'.

Consider something like:

harlow

Golang Workers / Job Queue

A running example of the code from:

• http://marcio.io/2015/07/handling-1-million-requests-per-minute-with-golang
• http://nesv.github.io/golang/2014/02/25/worker-queues-in-go.html

This gist creates a working example from blog post, and a alternate example using simple worker pool.

TLDR: if you want simple and controlled concurrency use a worker pool.