CSC/ECE 517 Spring 2015/ch1a 9 RA

Lazy Enumerators

Background

In Ruby 1.8 and Ruby 1.9 the problem with enumeration that generate infinite sequences is that we have to write special, non-greedy, versions of methods. But, if you’re using Ruby 2.0 or later, you have this support built in. If you call Enumerator#lazy on any Ruby enumerator, you get back an instance of class Enumerator::Lazy. Many basic class like Array and Hash has lazy method through Enumerator class.