PWC 353 To each (array) his own

The author found the weekly challenges to be easier than usual, a welcome relief before the holidays. The first task involved finding the maximum word count in a sentence array, solved with a simple one-liner using `split` and `max`. The second challenge required validating coupon codes based on specific criteria. The validation process involved checking code format with regular expressions, name categories using a hash lookup and status using string comparison. Two approaches were explored: explicit indexing and an iterator using `each_arrayref`. The iterator approach resulted in cleaner code despite being less efficient than explicit indexing. The author conducted benchmarking by running multiple iterations using the `Benchmark::cmpthese` function. This performance check revealed that the explicit indexing method was about twice as fast. Finally, the author provided example test case data with expected outputs for thorough testing.