Short questions on Ruby methods.

Intermediate Ruby questions on methods and manipulating data.

Classes, objects, class methods, instance methods, etc. Questions are inspired/sourced from the book Beginning Ruby.

Based on a book by Sandy Metz

Based on the excellent book by David Black.

How to use the File, CSV, and Dir Classes

Understand the code generated by Bundler to make a gem

Use jQuery to hide elements, change fonts, and more. Questions inspired from JavaScript: The Missing Manual.

Create a RESTful model, view, and controller without using any rails generators.

Create the model, view, and controller for a nested resource.

Backup a production database and manage an application that is on Heroku.

Structure database queries to get specific information from a database efficiently.

Make a resource that belongs_to two other resources for nested comments.

Let users sign-in/sign-out to your site with the Devise gem.

Assign the abilities of different types of users with the CanCan gem

Associations, delegation, callbacks, etc.

Rails practice problems on has_and_belongs_to_many and has_many :through relationships

Learn about the HTML that is generated by the form_for and form_tag helpers.

Make JavaScript objects with constructor and object literal notation.

Useful learning points from the excellent book JavaScript: The Good Parts.

Classic recursion problems including factorial, palindrome, etc.

Covers basic Git methods including $ git init, $ git add, $ git status, etc.

How to use and merge Git branches

Rebasing is the alternative to merging and is not scary once you understand it.

Create a branch off a branch and merge them together

Squash commits and make a clean commit history with interactive rebasing

Test a Ruby Calculator class with RSpec.

Shortcuts to use Gmail without a mouse.

Shortcuts to use Textmate more efficiently.

Beginner Unix quiz on core concepts (based on book by Dave Taylor).

Tags, selectors, and formatting with CSS.

Basic TDD with FactoryGirl.

Create and test a Rails API

Managing your Ruby gems.

Creating a form for a model within on model on the same page.

Customize URLs

Use YAML to access environment variables.

Rails polymorphism practice questions

Load associated resources to minimize database queries

Use a debugger to avoid constantly using puts.

Use the logger effectively to help you debug your app

Make fake objects for tests and avoid using fixtures

Put a fat model on a diet with modules and classes.

$ vimtutor

just for demo

Quiz on finance basics including market capitalization, P/E ratio, dividend yield, etc.

Use has_secure_password to better understand authentication.

Create a temporary guest user record so people can try out your app before signing up.

Naturally model heirarchical relationships in Rails.

Clean up database queries with Arel

Add permission to an app without using any third party gems.

Make an admin interface to interact with Active Record models