Ruby - Introduction Range method
Introduction
Range class has an each method of its own:
Demo
('A'..'Z').each { |letter| print letter }
Result
To test if something is included in the set of objects specified by the range.
For example, with your ('A'..'Z') range, you can check to see if R is within the range, using the include? method:
Demo
('A'..'Z').include?('R') ('A'..'Z').include?('r')
You can use ranges as array indices to select multiple elements at the same time:
Demo
a = [2, 4, 6, 8, 10, 12] p a[1..3]
Result
You can use them to set multiple elements at the same time:
Demo
a = [2, 4, 6, 8, 10, 12] a[1..3] = ["a", "b", "c"] p a
Result
