Notes from WDI Week 1

120115.md

#Command Line Just jotting down the ones that I didn't know about.

• top Table of processes

• whoami

• open . open in finder

• cd - Effectively a 'back' in windows

• ls -la long listing that lists hidden files

• cat (eg cat readme) Displays the file

• open -a "Sublime Text" [filename] Long way to open something in Sublime 3

• Add the following to ~/.bash_profile so that files can be opened easily in sublime alias subl="open -a 'Sublime Text'"

• Also add the following to .bash_profile to alter your bash prompt profile PS1="\W $ "

• ctrl-d closes terminal tab

• rm -rf / deletes your hard drive; The flag r is for recursive and f is for force

• which as in which ruby tells you the directory the command lives in

• alias lists aliases

• Useful aliases: l for ls -la and b for cd ..

• man manual

#Git

• Good way of passing code
• http://daringfireball.net/projects/markdown/ for Markdown tips

#Ruby

• Discusssion about syntax
• Backslash for escaping chracters
• snake case "hello_world"
• camel case "HelloWorld"
• constants are defined using all caps
• #{} is known as string interpolation
• Hash.new("brown") creates a hash where the default value is "brown"
• Exercises from RubyMonk

130115.md

#Git Intro

Useful commands

• git status
• git add Can specify a file or just give a directory
• git push does the same thing as git push origin master
• git clone
• git log Shows you what has happened recently. Not so useful for projects with lots of commits.
• git remote add origin https://github.com/try-git/try_git.git
• git diff HEAD tells you what's different if someone adds something to the remote repository not on your local
• git checkout -- octocat.txt Gets rid of all the changes from octocat.txt
• git reset octofamily/octodog.txt If you've commited octodog.txt, you uncommit it
• git branch _____ creates a new branch
• git checkout ______ switch to branch
• git merge _____ merge branch into master
• git branch -d clean_up deletes branch clean_up

Interesting points

• Can commit just the first 15 lines of the file
• Origin master refers to the online repo
• Github does not own Git

#Ruby Flow

Conditionals

Functions

Lab: Calculator