I want to ensure that a string does NOT contain another string located in a
field:
{{{ mystring +[!regexp{!!foo}] }}}
Fair enough. But, obviously(!?), if that !!foo field doesn't exist or is
empty then mystring *should *also pass the filter. But !regexp doesn't
allow this. (I reason "if mystring does not contain 'emptystring' nor
contains 'NIL' then it should pass")
How can I make a single filter that behaves as described?
Thank you!
<:-)
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