Thank you, johngg. Not sure why I complicated it. Yours is, indeed, a more elegant and readable solution (++). Was brought back to this node after the following should-have-done-this-in-the-first-place solution occurred to me:

$str =~ s/[^$acceptable]//gi;

[download]

Edited my original comment to reflect this...

In reply to Re^3: Filtering unwanted chars from input field by Kenosis
in thread Filtering unwanted chars from input field by Anonymous Monk

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