CSC/ECE 517 Spring 2015/ch1a 9 RA: Difference between revisions
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Lazy Enumerators | <font size="5"><b>Lazy Enumerators</b></font> | ||
=='''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. | |||
Revision as of 18:47, 1 February 2015
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.