Learn Ruby from Scratch

Takeaway Skills

Learn how to program using Ruby as your first programming language.

Learn idiomatic Ruby.

Get an introduction to blocks, lots of methods, and other things like using regular expressions in Ruby.

Learn how to program using Ruby as your first programming language.

Learn idiomatic Ruby.

Get an introduction to blocks, lots of methods, and other things like using regular expressions in Ruby.

Course Overview

Do you want to be an interpreted language geek? Are you tired of getting entangled in the dense syntaxes? Does it irritate you to compile your code to machine language first? Are you looking for an easy-to-use scripting language? Well, Ruby is the best pick for you then! Ruby is a sma... See More

How You'll Learn

Hands-on coding environments

You don’t get better at swimming by watching others. Coding is no different. Practice as you learn with live code environments inside your browser.

Faster than videos

Videos are holding you back. The average video tutorial is spoken at 150 words per minute, while you can read at 250. That‘s why our courses are text-based.

No set-up required

Start learning immediately instead of fiddling with SDKs and IDEs. It‘s all on the cloud.

Progress you can show

Built in assessments let you test your skills. Completion certificates let you show them off.

Hands-on coding environments

You don’t get better at swimming by watching others. Coding is no different. Practice as you learn with live code environments inside your browser.

Faster than videos

Videos are holding you back. The average video tutorial is spoken at 150 words per minute, while you can read at 250. That‘s why our courses are text-based.

No set-up required

Start learning immediately instead of fiddling with SDKs and IDEs. It‘s all on the cloud.

Progress you can show

Built in assessments let you test your skills. Completion certificates let you show them off.

Course Contents

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1. The Big Picture

Programming is Creation

Ruby is Object-oriented

2. Variables

What are Variables?

Reusing Variable Names

Things on the Right go First

Quiz on Variables

3. Built-in Class: Numeric

Working with Numbers

Quiz on Numerics

Exercise 1: Playing with Numbers

Exercise 2: Finding Modulo

Exercise 3: Even or Odd?

4. Built-in Class: String

Working with Strings

String Interpolation

Quiz on Strings

Exercise 1: Concatenate Substrings

Exercise 2: Padding & Justifying

Exercise 3: Convert String to Float

Exercise 4: Prepend a String

Exercise 5: Remove Characters from String

5. Built-in Classes: TrueClass, FalseClass and NilClass

The true, false, and nil Objects

6. Built-in Class: Symbol

Working with Symbols

7. Built-in Class: Array

Working with Arrays

Things You Can Do with Arrays

Quiz on Arrays

Exercise 1: Create an Array

Exercise 2: Interleaving

Exercise 3: Make an Expression

Exercise 4: Replace an Element in the Array

Exercise 5: Retrieve and Recombine Elements of an Array

Exercise 6: Reverse the Array

Exercise 7: Delete an Element

8. Built-in Class: Hash

Working with Hashes

Things You Can Do with Hashes

Hash Syntax Confusion

Quiz on Hashes

Exercise 1: Create a Hash

Exercise 2: Nested Hash

Exercise 3: Flip the Keys and Values

9. Objects

Objects, Classes and Methods

Objects are Instances of Classes

Objects have Methods

Calling Methods

Passing Arguments

Listing and Chaining Methods

Predicates

Bangs

Quiz on Objects

Exercise 1: Chaining

10. Methods

Methods

Constituents

Method Definition

Usage

Return Values

Scopes

Combining Methods

Printing Things

Flow of Execution

Quiz on Methods

Exercise 1: Greet a Person

Exercise 2: Greet Randomly

Exercise 3: Convert Miles to Kilometers

Exercise 4: Check Leap Year

11. Operators are Methods

Arithmetical Operators

Logical Operators

Comparison Operators

Operators are Methods

Quiz on Operators

12. Blocks

What are Blocks?

Alternative Block Syntaxes

Block Arguments

Block Return Values

Exercise 1: Extract Even Elements from Array

Inversion of Control

Iterators

Quiz on Blocks

Exercise 2: Even Reversed

Exercise 3: Sum the Rows of a Matrix

Exercise 4: Print the Output Using Nested Arrays

Mini Project

Get Ready for Some More Drill!

13. Conditionals

What are Conditionals?

Shorthand Syntax

Conditionals Return Values

Nothingness and the Truth

Quiz on Conditionals

Exercise 1: Number of Days in a Month

14. Coding Challenge: Truthiness and Equivalence

Challenge 1: Checking Truthiness

Challenge 2: Equivalent Objects

Mini Project

Lets Run Another Lap with Hashes

15. Writing Classes

Getting Started with Classes

Defining and Instantiating Classes

Defining Instance Methods

Initializing Objects

Instance Variables

Class Variables

Attribute Readers

Attribute Writers

State and Behavior

Interacting Objects

Object Scope and Self

Quiz on Classes

Exercise 1: Make a Rectangle Class

Exercise 2: On Class Methods

Mini Project

The Mailbox Project

16. Spotlight on Things Unremarked

Top-level Object

Escape sequences

Alternative Syntaxes

Lots of Other Methods

Using the Right Words

Terminology: Arguments vs Parameters

Arguments and Parentheses

Thought Process Behind Writing a New Method

Attention to the Role Played by a Method

Quiz on Things Unremarked

Exercise 1: Check the Array Equality

17. Advanced Topics

Using Libraries

Modules

Private Methods

Regular Expressions

More on Character Classes (Regex)

Quiz on Advanced Topics

Exercise 1: Capture the Class Names

Exercise 2: Using a Module

18. Your Toolkit

Text Editor

Terminal

Interactive Ruby shell

Programming Independently

19. Appendix: Mailbox Project Prerequisite

A brief detour: HTML