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Learn Ruby from Scratch

Discover Ruby's simplicity and power through hands-on practice. Gain insights into variables, built-in classes, objects, and more, making you productive and happy with programming.

Beginner

124 Lessons

12h

Certificate of Completion

Discover Ruby's simplicity and power through hands-on practice. Gain insights into variables, built-in classes, objects, and more, making you productive and happy with programming.

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This course includes

3 Projects

177 Playgrounds

31 Challenges

13 Quizzes

Course Overview

What You'll Learn

Course Content

Recommendations

Course Overview

Do you want to learn about interpreted languages? Tired of dense syntaxes? Tired of compiling code to machine language first? Are you looking for an easy-to-use scripting language? Well, Ruby is the answer! Ruby is a smart, easy-to-use, functional, object-oriented programming language, a wondrous mix of Perl's scripting power, Pythonic capabilities, and more! As Matsumoto, creator of Ruby, implies: "I hope to see Ruby help every programmer in the world to be productive, and to enjoy programming, and to be ...Show More

Do you want to learn about interpreted languages? Tired of dense syntaxes? Tired of compiling code to machine language first? Ar...Show More

TAKEAWAY SKILLS

Ruby

Programming Language

Learn to Code

What You'll Learn

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

Learn idiomatic Ruby.

Learn about blocks, methods, regular expressions, and more in Ruby.

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

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Course Content

1.

The Big Picture

2 Lessons

Get familiar with Ruby's object-oriented paradigm and the creative aspect of programming.

Programming is Creation

Ruby is Object Oriented

2.

Variables

4 Lessons

Walk through Ruby variable assignment, reassignments, and operator precedence.

What are Variables?

Reusing Variable Names

Things on the Right Go First

Quiz on Variables

3.

Built-in Class: Numeric

5 Lessons

Go hands-on with numeric operations, including Integers, Floats, and practical exercises.

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

8 Lessons

Grasp the fundamentals of Ruby strings, including manipulation, interpolation, and common string methods.

Working with Strings

String Interpolation

Quiz on Strings

Exercise 1: Concatenate Substrings

Exercise 2: Padding and Justifying

Exercise 3: Convert String to Float

Exercise 4: Prepend a String

Exercise 5: Remove Characters from a String

5.

Built-in Classes: TrueClass, FalseClass, and NilClass

1 Lessons

Take a look at Ruby's true, false, and nil objects representing truth values and absence.

The true, false, and nil Objects

6.

Built-in Class: Symbol

1 Lessons

Investigate the unique role of symbols as memory-efficient string alternatives in Ruby.

Working with Symbols

7.

Built-in Class: Array

10 Lessons

Test your understanding of arrays in Ruby with versatile exercises and practical manipulation tasks.

Working with Arrays

Things We Can Do with 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

7 Lessons

Learn how to use hashes, their syntax, methods, and practical exercises in Ruby.

Working with Hashes

Things We Can Do with Hashes

Hash Syntax Confusion

Exercise 1: Create a Hash

Exercise 2: Nested Hash

Exercise 3: Flip the Keys and Values

9.

Objects

10 Lessons

Unpack the core of objects, classes, and methods in Ruby programming.

Objects, Classes, and Methods

Objects Are Instances of Classes

Objects Have Methods

Calling Methods

Passing Arguments

Listing and Chaining Methods

Predicate Methods

Quiz on Objects

Exercise 1: Chaining

10.

Methods

13 Lessons

Master the steps to creating, using, and combining methods, including defining scopes and returning values.

Method Definition

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

11.

Operators are Methods

6 Lessons

Break down complex ideas in Ruby operators and their behavior as methods.

Arithmetic Operators

Logical Operators

Comparison Operators

Operators Are Methods

Quiz on Operators

Exercise 1: Check Leap Year

12.

Blocks

11 Lessons

Take a closer look at Ruby blocks, various syntaxes, arguments, return values, iterators, and practical exercises.

What Are Blocks

Alternative Block Syntaxes

Block Arguments

Block Return Values

Exercise 1: Extract Even Elements from an Array

Inversion of Control

Exercise 2: Even Reversed

Exercise 3: Sum the Rows of a Matrix

Exercise 4: Print the Output Using Nested Arrays

Get Ready for Some More Drill!

Project

14.

Conditionals

6 Lessons

Investigate Ruby conditionals, shorthand syntax, return values, truthiness, and practical exercises.

What Are Conditionals?

Shorthand Syntax

Conditionals Return Values

Nothingness and the Truth

Quiz on Conditionals

Exercise 1: Number of Days in a Month

15.

Coding Challenge: Truthiness and Equivalence

2 Lessons

Test your understanding of truthiness and object equivalence through coding challenges.

Challenge 1: Checking Truthiness

Challenge 2: Equivalent Objects

Lets Run Another Lap with Hashes

Project

17.

Writing Classes

14 Lessons

Learn how to use classes, methods, variables, and object interactions in Ruby.

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

The Mailbox Project

Project

19.

Spotlight on Things Unremarked

11 Lessons

Walk through Ruby's top-level object, escape sequences, syntax alternatives, and method usage.

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

20.

Advanced Topics

8 Lessons

Work your way through advanced Ruby topics including libraries, modules, private methods, and regex.

Using Libraries

Private Methods

Regular Expressions

More on Character Classes (Regex)

Quiz on Advanced Topics

Exercise 1: Capture the Class Names

Exercise 2: Using a Module

21.

Your Toolkit

4 Lessons

Grasp the fundamentals of essential tools like text editors, terminals, and IRB for Ruby programming.

Interactive Ruby Shell

Programming Independently

22.

Appendix: Mailbox Project Prerequisite

1 Lessons

Solve problems in HTML for creating and displaying webpage structures in the browser.

A Brief Detour: HTML

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