lazy_enumerators

🐢 Processing Large Arrays Lazily with Enumerator::Lazy

When working with huge or infinite sequences, convert your array (or Range) to a lazy enumerator to defer computation until needed. Chaining lazy.select.map prevents building intermediate arrays and minimizes memory overhead. Call methods like first or take to realize only the required elements.

numbers = (1..Float::INFINITY).lazy
even_squares = numbers.select(&:even?).map { |n| n**2 }
p even_squares.first(5)
# => [4, 16, 36, 64, 100]