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NOTE

Contents

Jupyter Notebook

Shortcuts

  • Shift - Enter

    Run selected cell and turn to next cell as the code mode

  • Ctrl - Enter

    Run selected cell

  • Double press "D"

    Delete selected cell

  • Shift - M

    Merge selected cells

C#

Machine Learning

Install Tensorflow

MacOS

Use Virtualenv

  • Recommened
  1. Start a Terminal ( shell )
  2. install pip and Virtualenv
$ sudo easy_install pip
$ install --upgrade virtualenv
  1. Create a Virtualenv environment
$ virtualenv --system-site-packages targetDirectory # for Python 2.7
$ virtualenv --system-site-packages -p python3 targetDirectory # for Python 3.n

Note: where targetDirectory identifies the top of the Virtualenv tree. Our instructions assume that targetDirectory is ~/tensorflow, but you may choose any directory.

  1. Activate Virtualenv environment
$ cd targetDirectory
$ source ./bin/activate      # If using bash, sh, ksh, or zsh
$ source ./bin/activate.csh  # If using csh or tcsh

The preceding source command should change your prompt to the following:

(targetDirectory)$
  1. Ensure pip ≥8.1 is installed
(targetDirectory)$ easy_install -U pip
  1. Issue one of the following commands to install TensorFlow and all the packages that TensorFlow requires into the active Virtualenv environment
(targetDirectory)$ pip install --upgrade tensorflow      # for Python 2.7  
(targetDirectory)$ pip3 install --upgrade tensorflow     # for Python 3.n
  1. Optional.
    If Step 6 failed, install TensorFlow in the active Virtualenv environment by issuing a command
pip install --upgrade tfBinaryURL   # Python 2.7
 $ pip3 install --upgrade tfBinaryURL  # Python 3.n

where tfBinaryURL identifies the URL of the TensorFlow Python package. The appropriate value of tfBinaryURL depends on the operating system and Python version. Find the appropriate value for tfBinaryURL for your system here. For example, if you are installing TensorFlow for macOS, Python 2.7, the command to install TensorFlow in the active Virtualenv is as follows

$ pip3 install --upgrade \
 https://storage.googleapis.com/tensorflow/mac/cpu/tensorflow-1.6.0-py3-none-any.whl

Use native pip

Use Docker

Use Conda

Ubuntu

Windwos

From Source

Network & Communication

Ethernet

Internet

Block Chain

Database & SQL

Database

SQL

SQL , Structured Query Language
不同 資料庫管理系統 在執行資料庫工作時 所使用的語言

AppServ

Install

Windows
AppServ官網 點擊 AppServ v2.5.9 & 2.4.9 with Zend Optimizer AddOns Released !

  • When Installing, following the steps of the wizard.
  • Type "localhost" & your email address, let the Apache HTTP Port as 80 as default
  • Enter Root Password and confirm again, The Character Sets and Collations should be the option UTF-8 Unicode
  • Then the install will be finish.

Starting Apache

  • Using the broswer and point to http://localhost/
  • If the web shows fail to connect with the localhost,

Windows >> Program >> AppServ >> Control Server by Service >> Apache Start

Stop Apache

Windows >> Program >> AppServ >> Control Server by Service >> Apache Stop

XAMPP

Install

MacOS XAMPP Website choose the OS-Version
Here I choose XAMPP 7.2.2 / PHP 7.2.2

  • Open the manager run the three services
  • If the Apache Server cannot be runing, type the command line in Terminal
sudo launchctl unload -w /System/Library/LaunchDaemons/org.apache.httpd.plist

Disable OSX's built-in Apache server

reference from here

  • Now we need to change the default password
  1. Go to http://localhost/dashboard/ in Safari
  2. Choose HOW-TO Guides then select Reset the MySQL/MariaDB Root Password, it will show you how to change the password.
  3. Or you can open a terminal
$ /Applications/XAMPP/bin/mysqladmin --user=root password "NEW_PASSWORD"

語法

  • SELECT "欄位" FROM "表格名";
  • SELECT DISTINCT "欄位"
    FROM "表格名";
Error
New XAMPP security concept:

Access to the requested directory is only available from the local network.

This setting can be configured in the file "httpd-xampp.conf".
Under Mac
  1. sudo gedit /opt/lampp/etc/extra/httpd-xampp.conf
  2. As below: Search "phpmyadmin"
<Directory "/opt/lampp/phpmyadmin">
    AllowOverride AuthConfig
    Allow from all
    Require all granted
</Directory>
Under Windows
  1. Search "httpd-xampp.conf", it should be under C://xampp/
  2. Find "phpmyadmin"
  3. As below:
<Directory "/opt/lampp/phpmyadmin">
    AllowOverride AuthConfig
    Allow from all
    Require all granted
</Directory>

Start phpMyAdmin

User: root
Password: 0800080128

Create Database in phpMyAdmin

  • Type the name of the database, select the second colume to utf-8_unicode_ci
  • You will see there is some SQL Command
CREATE DATABASE `(Your_database_name)`DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
  • Then we need to create a table in this database
  • Type the name of the table, and type how many columes we need in this table

Create

Create Database

CREATE DATABASE `Database_Name` DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;

註：COLLATE 語系校正

Create Table

CREATE TABLE Table_Name (
	1st_Column 1st_Column_Data_Type
	2nd_Column 1st_Column_Data_Type
)

Web

- HTTP

- PHP

是一種創建動態交互站點的服務器端腳本語言

Example

<!DOCTYPE html>
	<html>
		<body>

			<?php
			echo "Hello World!";
			?>

		</body>
	</html>

- CSS

  • Cascading Style Sheets (串接樣式表)
  • 用來替HTML增加Style ex. Color, Font Size, Font Type...

- JS

- JSON

Markdown

Font

Quote

Subscript & Superscript (上標 & 下標)

  • 上標 Superscript : <sup> </sup>
a<sup>2</sup>

a2

  • 下標 Subscript : <sub> </sub>

Code

Table

aaa bbb ccc
123 121 122 
aaa | bbb | ccc
--- | --- | ---
123 | 121 | 122

Link

  • With Title
  • Without Title

Picture

Steps

  1. New a Repo and it will be like a server to save photos
  2. Just use git clone http ... git push to upload the photos
  3. Go to Repo and click download in the photo
  4. Copy the path
  5. The format will be like this 
    ![1](https://raw.githubusercontent.com/jason19970210/MarkdownPhotos/master/1.png)

Highlight Text in diff

\```diff
+ this will be highlighted in green
- this will be highlighted in red
\```

Then it will goes like

+ this will be highlighted in green
- this will be highlighted in red

Folding

#### 问答

<details>
  <summary>什么是iuap design</summary>
  iuap design 是用友网络FED团队开发的企业级应用前端集成解决方案。
</details>

<details>
  <summary>什么是tinper</summary>

`tinper`是开源前端技术平台。
</details>

預覽效果

问答

什么是iuap design iuap design 是用友网络FED团队开发的企业级应用前端集成解决方案。
什么是tinper

tinper是开源前端技术平台。

Terminal

  • ls

    List all files in this path

  • cd
  • cd ..
  • mkdir

    Create folder

  • touch

    Create file

  • ping
  • traceroute
  • sudo spctl --master-disable

    Allow Mac to install applications from any Anywhere

  • nslookup google.com
  • nslookup - xx.xx.xx.xx
  • pip3 install matplotlib
  • ps -ax
  • sudo su -

    set authority to root

  • pwpolicy -clearaccountpolicies

    decline all password security checking for global
    for me to set short password as well
    after enter this command, type the password then go to Setting to change the password for our own

  • xcode-select --install

    Install Xcode Dev Tool by command-line

  • sudo codesign --force --deep --sign - /Applications/name.app

    Re-sign the signature of the application

  • sudo xattr -d com.apple.quarantine /Applications/name.app

    Re-sign the signature of the application

  • apachectl start

    Start Apache

  • sudo purge

    Cleaning the memory of MacOS

  • scp -r username@ipaddress:path/on/remote/server path/to/localhost

    copy the folder with -r option to the localhost, without -r can only transfer the file

  • scp -r localhost/path/folder username@ipaddress:path

    copy the folder from local to remote server

  • sudo sysctl debug.lowpri_throttle_enabled=0

    make "Time Machine" runs at full speed

  • sudo sysctl debug.lowpri_throttle_enabled=1

    make "Time Machine" runs at default speed

Ref : https://www.digit77.com/skills/macos/speed-up-time-machine.html

  • custom launchpad rows & columns
defaults write com.apple.dock springboard-columns -int <COLUMNS>;defaults write com.apple.dock springboard-rows -int <ROWS>;defaults write com.apple.dock ResetLaunchPad -bool TRUE;killall Dock

https://applefans.today/macos-launchpad-column-and-rows

Windows Terminal

Raspberry Pi (Linux)