At 07:36 2014-01-07, Laurie Alvey <truk...@btinternet.com> wrote:
I am trying to do some basic format validation on a string which
purports to be an email address. I want test that "@" occurs once
and once only and "." (period) occurs at least once. This is what I have tried:
Beware of partially validating data. Note that a regex is
insufficient to validate an arbitrary E-mail address. There is a
monster that almost does it and which is close to 2K long.
Going by what you asked for above:
Let ea be the E-mail address. Then:
at("@",ea)>0 and at("@",ea,2)=0 and at(".",ea)>0
ought to do (untested) what you asked for, but it will also accept:
@.
.@
Sincerely,
Gene Wirchenko
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