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JumpStart Live (JSL)

Day 1

Workflow

MacOSX splitting your screen

There are number of ways to split your screen, and move your windows around, a few options are listed below

  • Native to MacOSX, use Desktops and Split Views
  • Install Spectacle (Free)
  • Install Moom ($10)
  • Install Divvy ($13.99)

Terminal

When programming you should always have a Terminal window open

Opening Terminal

  • cmd+spacebar to open spotlight, then type Terminal
  • Drag Terminal to your Dock (if it's not already there)

Terminal commands

Command Description
cmd + K clear your screen
touch <filename> creates a new file named filename
pwd prints the working directory (displays the full path of the current directory)
cd choose a directory
cd .. go back a directory
cd ~ choose home directory
ls list the items in the directory
ls -a list the items in the directory, including hidden files
mkdir make a new directory
rm <filename> removes the file named filename
rm -r <dirname> removes the directory (and everything in it) named dirname
↑ view the previous command
ctrl + a go to beginning of line
ctrl + e go to end of line
alt + → move to the right, one word
alt + ← move to the left, one word
ctrl + c interrupt or stop a command

irb commands

Command Description
irb start interactive ruby session
exit exit an irb session
ctrl + c interrupt or stop a command

Running Ruby files in Terminal

  • Type ruby followed by the name of the Ruby file (e.g., ruby hello_world.rb)

VS Code

  • If VS Code is not already in your Applications folder move it there
  • In VS Code, type shift-command-p and type shell command to install the terminal shell command.
  • Now, to launch VS Code from terminal, type code followed by the file name or directory name

Customizing Your Shell - Optional

Bash Profile

If you are running a Mac computer with an operating system prior to Catalina your terminal uses a shell (command-line program) called Bash. You can customize your Bash shell with a unique prompt and other items.

  • .bash_profile is a hidden file in your user directory that you can edit to customize the terminal prompt (among a number of other things)
  • Type code ~/.bash_profile to open it (if it doesn't already exist, this command will create it)

PS1

  • PS1 is the environment variable for the bash prompt
  • PS1 stands for Prompt String 1, there is also PS2, PS3, and PS4
  • The default string stored in PS1 is \s-\v\$
  • To change PS1, add export PS1=" " to your .bash_profile (no spaces on either side of the equal sign)
  • Add anything in the quotes that you would like (some options below)
    • \s – name of shell (e.g., bash)
    • \v – version of bash
    • \d – current date
    • \t – current time
    • \u – user name
    • \W – current working directory
    • You can even add emoji, in Code, click Edit > Emjoi & Symbols
  • When you are done editing, save in VS Code and then type source ~/.bash_profile in Terminal to apply the changes

zsh Profile

If you are running Catalina, the latest Mac operating system, you are probably using the zsh shell. There is a wonderful tutorial on sriptingosx.com which walks you through different ways to customize zsh. I particularly like the part on git integration.

To customize your zsh shell you can edit or create the ~/.zshrc file and put your configurations in there. There is also a nice zsh plugin called ohmyzsh.

Resources