Ruby Programming Guide
First, start
1.1, Output / Print)
1.2, note
Second, string
Difference between single quotes and double quotes
Third, regular expression
3.1, introduction
3.2, the main features of regular expressions
3.3, regular expression
Fourth, array and hash
4.1, summary
4.2, array
4.3, Hashe
V. Control structure
5.1, summary
5.2, statement
5.3, while cycle
Sixth, method
First method
Seven, classes and instances
7.1, statement and instantiation a class
7.2, variable
7.2.1
, Instance variable
7.2.2
Class variable
7.3, "constructor"
