sheronw

let list = [6,8,10];
list.tag = "hello";

// values of the numeric properties of the object being iterated
for(i of list) { // 6 8 10
  console.log(i)
}

// keys on the object being iterated
for(i in list) { // 0 1 2 tag

sheronw

git checkout master
# put everything remote to this branch
git rebase origin master
# merge another branch to the updated master
git merge your-branch --allow-unrelated-histories

sheronw

// var is kind of global variable
console.log(a); // undefined
var a = "wow";
console.log(a); // wow
var a = "wowow";
console.log(a); // wowow

// visible globally
// visible only within a block
while (true) {

sheronw

// 1. as an object
// it works as "let" i.e. visible in block
func1("wow"); // Error
let func1 = function(var1) {
  console.log(var1);
}
func1("wow"); // wow

// 2. as a function
func2("wow"); // wow

sheronw

const https = require("https");

const api_token = "你的 API Token";
const workplace_id = "你的 Workplace ID";
const user_agent = "你的邮箱或应用名";

const webhook = `https://maker.ifttt.com/trigger/你的Event名/with/key/你url的key`;

const url = new URL(
  "https://toggl.com/reports/api/v2/details?user_agent=" +

sheronw

const Crawler = require("crawler");
const textToSpeech = require('@google-cloud/text-to-speech');
const fs = require('fs');
const util = require('util');
const MPlayer = require('mplayer');

const player = new MPlayer();

async function getSpeech(ssml) {
  // Construct the request

sheronw

import PropTypes from 'prop-types';

class App extends Component {...
  getSth(){ return this.xxx; } // getSth = () => this.xxx;
  render() {
    return (<p>{this.getSth().bind(this)}</p>)
  }

}

sheronw

# valid for pyrealsense2 2.35.2
# make sure to upgrade python and other packages (cmake, for example)
# https://github.com/IntelRealSense/librealsense/tree/master/wrappers/python for details

# 1. download source code from 
# https://github.com/IntelRealSense/librealsense/releases

# 2. in the top level of the package
mkdir build
cd build

sheronw

# 1. committed
# 2. staged but not comitted
# 3. not added to stage

# compare between 2 & 3
git diff [file]

# compare between 1 & 2
git diff [file] --cached

sheronw

# Based on Ubuntu 20.04
apt get install python3 python3-distutils ninja-build libpciaccess-dev

# add Mako and meson dependency from python
wget https://bootstrap.pypa.io/get-pip.py
python3 get-pip.py
pip install Mako
pip install meson

# download and install newest libdrm