What are some examples of iterators in Ruby?

What are some examples of iterators in Ruby?

In Ruby, iterators are methods that allow you to traverse through collections. Some common examples include each, map, and select. Would you like to see examples of how to use them?

Yes, please show me how to use each.

Sure! The each method iterates over each element in a collection. For example:

[1, 2, 3].each do |number|
  puts number * 2
end

This will output 2, 4, and 6. Would you like to see another iterator?

What about map?

The map method creates a new array containing the results of running the block once for every element in the original array. For example:

squared = [1, 2, 3].map { |number| number ** 2 }
puts squared.inspect

This will output [1, 4, 9]. Do you want to learn about select next?