Ruby
155
Keywords and functions
62
Changes in new versions
9
Type initialization
64
Basic types
49
Arrays and collections
26
Control flow
47
Classes
7
Structures (records)
2
Enumerations
3
Dynamic types
11
Functions
13
Lambda expressions
4
Multithreading
8
Exception handling
6
Regular expressions
27
Files
5
Operator overloading
9
Serialization
5
Colors
9
Algorithms
36
Design patterns
8
Extensions
3
Reflection (late binding)