OdinProject/TheOdinProjectNotes.md

The Odin Project

How to ask good programming questions

• Be very specific and patient
• use screenshots when available
• ask questions directly instead of asking to ask ie. "are there any java experts around?"

Git

Set up Git

• Set username and email

git config --global user.name "username"
git config --global user.email "email"

• If using GitHub, change branch from 'master' to 'main'

git config --global init.defaultBranch main

• Enable colorful output with git

git config --global color.ui auto

• Set default branch reconciliation behavior to merging

git config --global pull.rebase false

• Verify the config

git config --get user.name
git config --get user.email

Create an SSH Key for repos

• SSH keys are good for avoiding retyping credentials every time
  • Check to see if there is an existing ssh key

ls ~/.ssh/id_ed25519.pub

- if nothing appears, then there is no key and one needs to be made

• Create ssh key

ssh-keygen -t ed25519 -C <youremail>

• press enter when asked for what location to store it unless you have a specific location
• add a passphrase and retype it

Link SSH key to Git

• Find the ssh key input on GitHub or repository website of your choice
• Click on new ssh key and give it a name and leave the window open for the next steps
• Copy the public SSH key

cat ~/.ssh/id_ed25519.pub

• Paste the key into your settings, it should start with ssh-ed25519 and end with your email

Change git repository remote

git remote set-url origin https://'username':'password'@repositorylink

Using Git

• Check git version by using git --version
• After creating a new repository you can clone it to your current directory by using git clone <repolink>
• After the cloning, check the url with git remote -v
• Use git status to check the status of the current files within your directory
• To commit to the repo you can use git commit -m "Add helloworld.txt"
• Confirm with git status
• You can use git log to view the most recent commits
• After creating a file you can use git add <filename> to add that specific file or git add . to add all files within the directory that are not on the repo
• We can push the changes to the cloud repository with git push origin main, origin being the remote location and main being the branch to upload to
  • Make sure to only push working code

Git Best Practices

• Atomic commits
  • A commit that includes changes related to only one feature or task of your program.
    • Easily reversible if the commit causes breaking changes
    • Enables you to write more specific commit messages

Changing the Git Commit Message Editor

• Typing git config --global core.editor "code --wait" into the terminal will give you the option to use either git commit -m <your message here> or git commit without anything extra.

Introduction to HTML And CSS

• What is HTML?
  • Stands for Hypertext Markup Language
  • It's the raw data that a webpage is built out of. Includes:
    • text
    • links
    • cards
    • lists
    • buttons
• What is CSS?
  • Stands for Cascading Style Sheets
  • It's the styling of the HTML page
    • Controls colors
    • Controls Positioning of text and font
• HTML and CSS are not programming languages, technically speaking because they only present information and are not used to compute any logic
• JavaScript would be a programming language that leverages both HTML and CSS

Elements and Tags

• HTML defines the structure and content of webpages.
• HTML elements are used to create:
  • paragraphs
  • headings
  • lists
  • images
  • links
• Elements are simply pieces of content wrapped in opening and closing tags
  • Another way to define them is containers for content
  • Paragraph is <p> </p>
  • Some tags do not require a closing tag
  • line break is <br> or <br />
  • image insert would be <img /> or <img>
• There many tags, looking at documentation for most of them is standard HTML Elements
• Intro to HTML Video 3:42

HTML Boilerplate

• All HTML docs have the same basic structure that needs to be in place before anything useful can be done.
  • index.html

The DOCTYPE

• Every HTML page starts with a doctype declaration
• The purpose of it is to tell the browser what version of HTML it should use to render the document(current being HTML5)
  • HTML5 Doctype is <!DOCTYPE html>
• The doctypes for older version of HTML were more complicated
• Example of doctype for HTML4

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

HTML Element

• Now we need to provide an <html> element. More commonly known as the root element of the document
  • root means that every other element in the document will be a descendant of that one
• The lang attribute specifies the language of the text content in that element
  • primarily used for improving accessibility of the webpage
  • en is used for English
• The <head> element is where important meta-information about our webpages and items required for our webpages to render correctly in the browser
  • inside of the <head> element, there should not be any element that displays content on the webpage

The Charset Meta Element

• The meta tag for the charset encoding of the webpage in the head element: <meta charset="utf-8">
• The encoding ensures that the webpage will display special symbols and characters from different languages correctly in the browser

Title Element

• Should go in the head of an HTML doc <title>My First Webpage</title>
• It's used to give webpages a human-readable title which is displayed in our webpages' browser tab
• The default title for a webpage is it's filename, in this case index.html
  • This is a security risk as you wouldn't want the internet to know what any of your files are named or how they are placed within the project directory
  • Also would make it difficult for the end user to remember what tab it is if they have multiple open

<!DOCTYPE>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>My First Webpage</title>
    </head>
</html>

Body Element