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IlkhamGaysin/lazy_module_ruby.md

Created September 16, 2019 12:05
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lazy_module_ruby.md

Lazy

a = [1,2,3,4,2,5].lazy.map { |x| x * 10 }.select { |x| x > 30 } #=> no evaluation and creations of arrays

a.to_a #=> [40, 50], evaluation performed - no intermediate arrays generated.

Eager

a = [1,2,3,4,2,5].map { |x| x * 10 }.select { |x| x > 30 } #=> intermediate arrays generated
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