<wild speculation>
Although it's not my question, I can imagine
a situation where someone is validating a set of
variables which contain user-supplied data. A simple
design for validating them might involve a hash table
which correlates each data type to an "allowable" regex pattern.
Not that there aren't ways around this (perhaps using subroutines instead of regexes). But I'll admit that
I've done it before, cramming a lot of data validation
into a single regex for this purpose.
</wild speculation>
Update: I'm good. But I'm slow. Ah, well...
buckaduck
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