Flutter & Dart

2022-05-13 12:23:24

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"

Flutter 1.2

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

zsh bug

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

`.zshrc` path

current user path

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.<getFeedsResult[]>}

 */

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.<Object.<string, string>>} 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.<getBackendSummarySingleResult[]>}

 */

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);

}

码农公寓

Flutter & Dart

Flutter 1.2

zsh bug

.zshrc path

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`.zshrc` path