ZhengCheng 1c7

## Vue, v-for, display special element in certain position.pug
// This is written in Pug syntax. not HTML. but same thing. Pug would compile to HTML

template(v-for='(l, index) in list')
  topic-card(:topic='t', :key='t.id')
  template(v-if='index == 2')
    // [IMPORTANT: display your specifial element here]

## extract base64 <img> to image file
http://1c7.me/2018-8-31-fix-base64-img-in-database-to-url/

## ant-design-pro-route-example.js
import { routerRedux } from 'dva/router';

export default class Analysis extends Component {
  // ==============
  toUserList = () => {
    const { dispatch } = this.props;
    dispatch(routerRedux.push('/list/user-list'));
  };
  // ==============
  render(){

## img-src-to-image-file.py
# Python 3
import base64

# Fill in this
base64_string = 'data:image/jpeg;base64, ...etc..'

array = url.split('data:image/jpeg;base64,')
base64_naked = array[1]
imgdata = base64.b64decode(base64_naked)
with open('haha.jpg', 'wb') as f:

## upload.js
// 负责上传文件
import API_common from '@/api/common'


// 上传文件到七牛
// 这个函数用到了另外2个函数：get_upload_token, qiniu_upload
function upload(user_id, file, progress_callback){
  return new Promise(function (resolve, reject) {
    get_upload_token().then(token=>{
      resolve(token);

## Download Youtube Video
## What you need
1. youtube-dl
2. aria2
3. Proxy(if you live in Country like China)

## Run this in command line

export http_proxy=http://127.0.0.1:1087;export https_proxy=http://127.0.0.1:1087;

youtube-dl --external-downloader aria2c --external-downloader-args "-x 16  -k 1M" https://www.youtube.com/watch?v=rAeN7TdGq4o

## Vue.js String truncate filter.js
Vue.filter('fm-truncate', function (value, length) {
  if (!value) return ''
  value = value.toString()
  if(value.length > length){
    return value.substring(0, length) + "..."
  }else{
    return value
  }
})

## proxy
```bash
set http_proxy=http://127.0.0.1:1080;export https_proxy=http://127.0.0.1:1080;
```

## react-native-0.51-save-image-from-app-to-local.js
import RNFetchBlob from 'react-native-fetch-blob';
import RNFS from'react-native-fs';

  let dirs = RNFetchBlob.fs.dirs
  const file_path = dirs.DCIMDir + '/' + 'wechat.jpg';
  RNFS.copyFileAssets('wechat.jpg', file_path)
  .then(() => {
    RNFetchBlob.fs.scanFile([{ path: file_path }])
  })
  .catch((error) => console.log(error));

## btc-eth-dca-buy.php
<?
	//
	// [ BUY BTC & ETH DAILY ON BITSTAMP ]
	// by @levelsio
	//
	// 2017-08-23
	//
	// 1) buy $40/day BTC
	// 2) buy $10/day ETH
	//
	// This is written in Pug syntax. not HTML. but same thing. Pug would compile to HTML

	template(v-for='(l, index) in list')
	topic-card(:topic='t', :key='t.id')
	template(v-if='index == 2')
	// [IMPORTANT: display your specifial element here]
	import { routerRedux } from 'dva/router';

	export default class Analysis extends Component {
	// ==============
	toUserList = () => {
	const { dispatch } = this.props;
	dispatch(routerRedux.push('/list/user-list'));
	};
	// ==============
	render(){
	# Python 3
	import base64

	# Fill in this
	base64_string = 'data:image/jpeg;base64, ...etc..'

	array = url.split('data:image/jpeg;base64,')
	base64_naked = array[1]
	imgdata = base64.b64decode(base64_naked)
	with open('haha.jpg', 'wb') as f:
	// 负责上传文件
	import API_common from '@/api/common'


	// 上传文件到七牛
	// 这个函数用到了另外2个函数：get_upload_token, qiniu_upload
	function upload(user_id, file, progress_callback){
	return new Promise(function (resolve, reject) {
	get_upload_token().then(token=>{
	resolve(token);
	## What you need
	1. youtube-dl
	2. aria2
	3. Proxy(if you live in Country like China)

	## Run this in command line

	export http_proxy=http://127.0.0.1:1087;export https_proxy=http://127.0.0.1:1087;

	youtube-dl --external-downloader aria2c --external-downloader-args "-x 16 -k 1M" https://www.youtube.com/watch?v=rAeN7TdGq4o
	Vue.filter('fm-truncate', function (value, length) {
	if (!value) return ''
	value = value.toString()
	if(value.length > length){
	return value.substring(0, length) + "..."
	}else{
	return value
	}
	})
	```bash
	set http_proxy=http://127.0.0.1:1080;export https_proxy=http://127.0.0.1:1080;
	```
	import RNFetchBlob from 'react-native-fetch-blob';
	import RNFS from'react-native-fs';

	let dirs = RNFetchBlob.fs.dirs
	const file_path = dirs.DCIMDir + '/' + 'wechat.jpg';
	RNFS.copyFileAssets('wechat.jpg', file_path)
	.then(() => {
	RNFetchBlob.fs.scanFile([{ path: file_path }])
	})
	.catch((error) => console.log(error));
	<?
	//
	// [ BUY BTC & ETH DAILY ON BITSTAMP ]
	// by @levelsio
	//
	// 2017-08-23
	//
	// 1) buy $40/day BTC
	// 2) buy $10/day ETH
	//