Essential Books
0 Getting started
1 Casting type conversions
2 Arrays
3 Classes
4 Hashes
5 Blocks and procs and lambdas
6 Inheritance
7 Control flow
8 Strings
9 Symbols
10 Exceptions
11 Thread
12 Methods
13 Method missing
14 Numbers
15 Iteration
16 Regular Expressions and regex based operations
17 Comparable
18 Gem usage
19 Design patterns and idioms
20 Loading source files
21 Range
22 Comments
23 Operators
24 Operators
25 Special constants in Ruby
26 Modules
27 Ruby version manager
28 Gem creation / management
29 Constants
30 Variable scope and visibility
31 rbenv
32 Environment variables
33 Singletons
34 File I/O
35 Time
36 Queue
37 Destructuring
38 IRB
39 Enumerators
40 C extensions
41 Struct
42 Metaprogramming
43 Dynamic evaluation
44 instance eval
45 Message passing
46 Keyword arguments
47 DateTime
48 Truthiness
49 JSON with Ruby
50 Implicit receives, understanding
51 Monkey patching
52 Introspection
53 Monkey patching
54 Refinements
55 Monkey patching in Ruby
56 Catching exceptions with begin rescue
57 Command line apps
58 Debugging
59 Pure RSpec JSON API testing
60 Recursion
61 Installation
62 ERB
63 Introspection
64 Random numbers
65 Getting started with Hanami
66 OptionParser
67 Splat operator
68 Multidimensional Arrays
69 Enumerable
70 Ruby access modifiers
71 Operating system or shell commands
72 Contributors