, originally, I was constructing a rather longer and optimized script to do the pig latin conversion. Then I went back and reread vroom's
specs. First, I didn't use the /i modifier because he said we were to assume the data was lowercase and he wanted the shortest possible code.
The reason I am using three backreferences is because the data saved to $2 is tricky. Your equivalent (ignoring the "qu" problem) is [^\W0-9_]. This allows you to match all alphabeticals but does no discrimination for vowels. However, you apeared to notice this when you mentioned [b-df-hj-np-tv-z]. Therefore, I suspect that you intended the following and (assuming you did intend this) I offer you kudos for a clever regex:
I also noticed that, in this case, using the /i modifier ignored vroom's
"lowercase" spec, but does result in a shorter regex.
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