refactor: make Factorial a proper utility class
#4267
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vil02
requested review from
siriak,
yanglbme,
debasishbsws and
albina-astr
as code owners
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Following @siriak suggestion in #4266, I create this PR, which:
Factorialasprivate- it does not make sense to create any instances of this class (because it has only static method and no members),Factorialasfinal- it does not make sense to have any class extending it.All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.