How to install Ruby on Rails on macOS Sierra 10.12

  1. Install Homebrew. Homebrew simplifies the installation of software on Apple’s macOS operating system. Open Terminal and run the following command:
    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
  2. Install Xcode. Xcode is a software package to help you develop iOS and OS X applications. You don’t need the full Xcode package to get the Command Line Tools. Check if the full Xcode package is already installed:
    xcode-select -p

    if you see:

    /Applications/Xcode.app/Contents/Developer

    it means the full package is already installed. If you don’t have it, type this command to install:

    xcode-select --install

    then will appear this :

    xcode-select: note: install requested for command line developer tools.

    An update popup window will appear to install the command line developer tools. You can choose to confirm by clicking “install”. Wait for the Command Line Tools package download to complete.

     

  3. Install Ruby. Run the following commands in your Terminal:
    brew install rbenv ruby-build
    rbenv install 2.4.1
    rbenv global 2.4.1
    ruby -v

    #ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin15]

     

  4. Install Rails
    gem install rails -v 5.0.1

    installingrailinstallingrail2

  5. Execute the Rails with this command:
    rbenv rehash
  6. Verify Rails version:
    rails -v

    #Rails 5.0.1

  7. Setting up a database using mySQL
    brew install mysql

    installingmysql
    To have launchd start mysql now and restart at login:
    brew services start mysql
    Or, if you don’t want/need a background service you can just run:
    mysql.server start

  8. Final steps to create your first Rails application:
    rails new myfirstapp
    rails new myfirstapp -d mysql
    #move to the folder directory
    cd myfirstapp
    #Create the database
    rake db:create
    rails server
  9. Open your browser and type http://localhost:3000 to view your website.localhost.png

How to set up micro:bit and start your adventure

What is micro:bit?

micro:bit is a pocket-sized codeable computer with motion detection, a built-in compass and Bluetooth technology.

There are many micro:bit kit available out there. One of the samples is Tea Brewer Kit.

Please refer here for the instructions.

If you’re just getting started with the Micro Bit, we recommend you check out a few of the tutorials, uploaded by the BBC and its partners to the Micro Bit website.

OK. Let’s Get Started!

Connect the micro:bit to the battery holder and follow the instructions on the LED display.

  1. The LED display will light up, with the word “HELLO”
  2. The arrow signs pointing to the left button, and you’ll be asked to press the A button on the left, and next it will point to the right button, which is B button.
  3. It will display “SHAKE”
  4. CHASE THE DOT
  5. GREAT!. NOW GET CODING!

This sequence will run each time you power up until you upload your own program to it.

Now, it’s time to start making your own program.

You can go to www.microbitworld.me. There are lots of tutorials and information on the website. You can select your coding editor that you would like to code with.
codingeditor

Let’s try to make a simple code to display word “ONVINETECH”.

  1. Open a web browser and type https://pxt.microbit.org/
  2. Click Input and drag “on button A pressed”
    input
  3. Click Basic and drag a Show String block from the sidebar to the stage
    showstringcode
  4. Click the A button on a micro:bit simulator.
  5. Give it a name and click save, it will automatically download the file to your “Downloads” folder.
  6. Open the Downloads folder click and drag .hex file into microbit drive.
  7. Disconnect it and press the A button, it will display the word “ONVINETECH” across the LED Display.

Let’s follow another tutorial from this website how to create a compass with “If Statement.”

The micro:bit has an on board compass. This compass has to be calibrated the first time that it is used, so that the readings that it produces are accurate. When you load a program into the micro:bit and your program tries to read from the compass, it will scroll the words ‘DRAW A CIRCLE’ on the screen. Hold the micro:bit horizontally and tilt it on the spot trying to fill in the circle, until all the dots are filled and then you see a smiley face. After you have done this, your program will run.

compasscode

Thanks for reading. Have fun and start to coding. Do share with me about your projects using micro:bit.