external_iterators_enum_for

🔂 Create and Rewind External Iterators with enum_for

Convert any method or object into an external iterator using enum_for (or to_enum), allowing manual control over iteration and rewinding.

array = [10, 20, 30]
enum  = array.to_enum

enum.each { |x| puts x * 2 }
# Outputs 20, 40, 60

enum.rewind
enenum.each { |x| puts x + 5 }
# Outputs 15, 25, 35