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flori/Ruby Lazy demonstration

Created July 12, 2013 08:26
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Ruby Lazy demonstration
>> natural = (1..Float::INFINITY).lazy
# => #<Enumerator::Lazy: 1..Infinity>
>> even = natural.select { |x| x % 2 == 0 }
# => #<Enumerator::Lazy: #<Enumerator::Lazy: 1..Infinity>:select>
>> even.take(10).to_a
# => [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
>>
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