You can probably avoid map by using 
'(?:' . join(')|(?:', @blacklist_words) . ')'

[download]

But, if the "words" can contain non-alphabetical characters with special meaning in regexes, you might need to map quotemeta to each word.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Best approach to creating a regex from a filehandle by choroba
in thread Best approach to creating a regex from a filehandle by fieroboom

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