mullaney

Essential ruby questions on Stack Overflow:

• What does map(&:name) mean in Ruby?
• How to write a switch statement in Ruby
• Check if a value exists in an array in Ruby
• A concise explanation of nil v. empty v. blank in Ruby on Rails
• What is attr_accessor in Ruby?
• Calling shell commands from Ruby
• What does %w(array) mean?

mullaney

With Indifferent Access - Symbols and Strings as keys in Rails

When I first started using Ruby on Rails, I did not have a deep understanding of how hashes worked or the difference between keys that are symbols (:my_key) and keys which are strings ('my_other_key'). I assumed wrongly that symbols were simply aliases of strings that the following lines of code were equivalent:

my_hash['key'] = 'my value'
my_hash[:key] = 'my value'

They aren't, of course. Those two lines of code establish two different key / value pairs. And if you print the my_hash, you get this:

mullaney

Git Cheat Sheet

Basic commands

git init Creates a new git repository in the directory

git add <file name> Adds a specific file to staging

git add . or git add -A Adds the full directory and its contents to staging

mullaney

Git Branch Cycle

Ready to tackle an issue? It's time to start working on branches

Step 1 - Make sure your master is up to date

git checkout master
git pull

mullaney

const express = require('express');
const app = express();

// port for local dev server
const port = 3000;

// for css/js/img assets and for any static files
app.use(express.static("public"));

// using ejs html templates in the views/ folder