[Solved] What is the main benefit of using .lazy enumerators in Ruby? — Ans: They delay computation until results are needed, saving memory and time. | Ruby

Ruby - Functional Patterns in Ruby

What is the main benefit of using .lazy enumerators in Ruby?

AThey sort elements in ascending order by default.

BThey immediately compute all elements for faster access.

CThey convert arrays into hashes automatically.

DThey delay computation until results are needed, saving memory and time.

Step-by-Step Solution

Solution:

Step 1: Understand what lazy enumerators do
Lazy enumerators delay the processing of elements until you actually ask for them, which helps save memory and time especially with large or infinite collections.
Step 2: Compare options with this behavior
Only They delay computation until results are needed, saving memory and time. describes this delaying behavior. Other options describe immediate computation, conversion, or sorting, which are not the main features of lazy enumerators.
Final Answer:
They delay computation until results are needed, saving memory and time. -> Option D
Quick Check:
Lazy enumerators delay work = A [OK]

Quick Trick: Lazy means delay work until needed, not immediate [OK]

Common Mistakes:

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