Aug 30

Announcements

• CCA Computer Club http://ccaprogramming.org
• App-A-Thon September 24, Congressional App Challenge, Cedar Rapids?

Sharing code

• Review basic shell commands -> pwd,cd, ls, man, touch, rm, cp, mv
• Review basic operators -> +, -, *, /, %, <, >, <=, >=
• Setup shell echo "export GIT_EDITOR=vim" >> ~/.profile then restart cloud9 workspace
• Brief intro to vi
• git add . -> Tell git which changes you want. The . means all
• git commit-> Record your changes in git. Use :wq to exit
• git push -> Send your changes to github
• Open a pull request (PR) on github

VI

• vi - good to know because it’s always available
• You should be in your “kNumber” directory
• vi test.txt
• vi is a modal editor
• type a j, it does nothing because you are in command mode
• type an ‘i’
• see the ‘insert’ text at the bottom now you are in ‘insert’ mode
• type j
• now you see the text
• type escape
• you are back in command mode
• type 10.
• what did it do
• type yy
• type 5p
• what did it do
• y = yank p = put/paste
• make sure you are in command mode
• what do h,j,k,l do?
• where have we seen this before?
• move your cursor some place and press x
• now try dd
• x = delete under cursor, dd = delete a line
• to quite, we need :q, what does the message say?
• use ! to override
• open file again
• add some text
• this time :w
• now :q

Python Variables

• LPTHW 4 - Variables
• LPTHW 5 - Variables with format strings