Flutter&Dart

https://www.dartlang.org/install

https://flutter.dev/
https://flutter.dev/docs/get-started/install/macos

flutter_macos_v1.2.1-stable.zip & 464 MB

https://storage.googleapis.com/flutter_infra/releases/stable/macos/flutter_macos_v1.2.1-stable.zip

https://flutter.dev/docs/development/tools/sdk/archive
https://flutter.dev/community/china

https://flutter-io.cn/
https://codelabs.flutter-io.cn/
https://codelabs.flutter-io.cn/codelabs/first-flutter-app-pt1-cn/index.html#0

https://classroom.udacity.com/courses/ud905

https://flutter.dev/docs/get-started/install/macos#get-the-flutter-sdk

https://flutter.dev/docs/get-started/install/macos#update-your-path

# pwd
export PATH="$PATH:`pwd`/flutter/bin"
# export PATH="$PATH:[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin"
# pwd === /Users/xgqfrms-mbp
export PATH="$PATH:/Users/xgqfrms-mbp/Documents/Flutter/flutter/bin"


https://flutter-io.cn/posts/launching-flutter-12-at-mobile-world.html

https://github.com/flutter/flutter/issues/29539#issuecomment-473825598

zsh !== native terminal

.zshrc !== .bash_profile


$ cat .zshrc
$ vim .zshrc
# flutter PATH & zsh
export PATH="$PATH:/Users/xgqfrms-mbp/Documents/Flutter/flutter/bin"
$ source $HOME/.zshrc


https://mirrors.sjtug.sjtu.edu.cn/#/

https://github.com/sjtug

rss-parser

import axios from 'axios'
import Parser from 'rss-parser'
import _ from 'lodash'
// The type of the return value of getFeeds()
// for documenting purpose only
// eslint-disable-next-line
function getFeedsResult () {
this.title = 'title of feed'
this.pubDate = new Date()
this.url = 'https://test.com'
}
/**
* @param {string} url
* @fulfill {getFeedsResult[]}
* @reject {Error}
* @return {Promise.}
*/
async function getFeeds (url) {
const parser = new Parser()
return parser.parseURL(url)
.then(({items}) => _.map(items, rssItem => ({
title: rssItem.title,
url: rssItem.link,
pubDate: new Date(rssItem.pubDate)
})))
}
/**
*
* @param {string} url
* @return {Promise.>} an object: name => desciption HTML
*/
async function getHelps (url) {
const parser = new Parser()
return parser.parseURL(url)
.then(({items}) => _.fromPairs(_.map(items, item => [item.title, item.content])))
}
// eslint-disable-next-line
function getBackendSummarySingleResult () {
this.name = 'name of this repo'
this.idle = false
this.result = true
this.lastFinished = new Date()
}
/**
* @param {string} url
* @return {Promise.}
*/
async function getBackendSummary (url) {
return axios.get(url)
.then(({data}) => _.map(data.WorkerStatus, (val, key) => ({
name: key,
idle: val.Idle,
result: val.Result,
lastFinished: new Date(val.LastFinished)
})))
.then(data => _.sortBy(data, 'name'))
}
export {
getFeeds,
getBackendSummary,
getHelps
}
// WEBPACK FOOTER //
// ./src/api/index.js


https://sjtug.org/js/rocket.js

https://github.com/sjtug/sjtug-mirror-frontend
https://github.com/sjtug/lug


var scene, camera, renderer, rocket, fire, mx, my;
var firescale = 1;
var rot_axis = new THREE.Vector3(0, 0, 1);
var trans_axis = new THREE.Vector3(-0.5, 0, 0.8);
var rot_lean = new THREE.Vector3(0, 1, 0);
var axis_c = new THREE.Vector3(0,0,0);
var axis_s = new THREE.Vector3(0,0,0);
var axis_h = (new THREE.Vector3(0,1,0)).applyAxisAngle(rot_axis, -0.02);
var axis_w = (new THREE.Vector3(1,0,0)).applyAxisAngle(rot_axis, -0.02);
var camera_pos = new THREE.Vector3(0, 0, 30);
var current_pos = new THREE.Vector3(0,0,0);
var delta = new THREE.Vector3(0,0,0);
var speedX = 0;
var speedY = 0;
var firel = 0.4;
var firer = 0.2;
var mx = 0;
var my = 0;
var xs = 0;
init();
function init(){
//scene = new THREE.Scene();
var WIDTH = 240;
var HEIGHT = 240;
renderer = new THREE.WebGLRenderer({'antialias':true});
renderer.setSize(WIDTH, HEIGHT);
camera = new THREE.PerspectiveCamera(45, WIDTH/HEIGHT, 0.1, 20000);
camera.position = camera_pos;
camera.lookAt(axis_c);
var loader = new THREE.SceneLoader();
loader.load("/js/rocket.json", function(s){
scene = s.scene;
rocket = s.objects['Rocket'];
fire = s.objects['Fire'];
rocket.rotateOnAxis(rot_axis, 1.508);
rocket.translateOnAxis(trans_axis, -2)
rocket.rotateOnAxis(rot_lean, -0.63);
fire.rotateOnAxis(rot_axis, 1.508);
fire.translateOnAxis(trans_axis, -2)
fire.rotateOnAxis(rot_lean, -0.63);
scene.add(camera);
document.body.Onmousemove= function(e){
var w = document.body.clientWidth/2;
mx = w-e.pageX;
if(firel<0.7) my = 300-e.pageY;
else {
mx=mx*0.2+xs;
my=300;
}
}
if (window.DeviceMotionEvent) {
deviceMotiOnHandler= function(e) {
document.body.Onmousemove= null;
var ax = event.accelerationIncludingGravity.x;
var ay = event.accelerationIncludingGravity.y;
var orient = window.orientation;
if (orient==0) {
mx = -ax * 80;
my = -ay * 80;
}
else if (orient==90) {
mx = ay * 80;
my = -ax * 80;
}
else if (orient==-90) {
mx = -ay * 80;
my = -ax * 80;
}
else if (orient==180) {
mx = -ax * 80;
my = ay * 80;
}
}
window.Ondevicemotion= function(e) {
var acc = e.acceleration;
if (acc.x != null || acc.y != null || acc.z != null) {
document.body.Onmousemove= null;
window.Ondevicemotion= deviceMotionHandler;
} else {
window.Ondevicemotion= null;
}
}
}
var logo = document.getElementById('logo');
logo.classList.add('ani');
logo.appendChild(renderer.domElement);
var joinLink = document.getElementById('join');
if (joinLink) {
joinLink.Onmouseover= function(e){
firel = 0.8;
firer = 0.1;
var w = document.body.clientWidth/2;
xs = w - e.pageX;
if (xs>80) xs=160;
else if (xs<-80) xs=-160;
else xs = 0;
}

joinLink.Onmouseout= function(e){
firel = 0.4;
firer = 0.2;
}
} else { // support pages with no join link
firel = 0.4;
firer = 0.2;
}
animate();
});
}
function step(camera) {
if (mx > 1000) mx = 1000;
else if (mx <-1000) mx = -1000;
if (my > 1000) my = 1000
else if (my <-1000) my = -1000;
delta.set(-mx, my, 0).applyAxisAngle(rot_axis, -0.02).sub(current_pos);
if (delta.x>20) delta.x=20;
else if (delta.x<-20) delta.x=-20;
if (delta.y>50) delta.y=50;
else if (delta.y<-50) delta.y=-50;
speedX += delta.x/2000;
speedY += delta.y/8000;
speedX *= 0.95;
speedY *= 0.80;
rocket.rotateOnAxis(rot_axis, speedX);
camera.position.applyAxisAngle(axis_w, speedY);
delta.x *= 0.5;
current_pos.add(delta);
if(firescale>=1) firescale = firel - firer*Math.random();
else firescale = firel + firer*Math.random();
fire.scale.z = firescale;
if (firel>0.7) {
axis_s.set(-Math.random(), -Math.random(), 0);
axis_s.multiplyScalar(0.4);
camera.lookAt(axis_s);
}
else camera.lookAt(axis_c);
}
function animate() {
requestAnimationFrame(animate);
step(camera);
renderer.render(scene, camera);
}