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regex question - symbol for "and"
Posted: Sun Aug 08, 2010 2:49 am
by allangjohnson
I know that a | is used for "or" in a regex expression as in yes|no but what is the symbol for "and"?
Thanks.
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 2:52 am
by anniebrion
Everything that is not an or (|) is an and.
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 2:55 am
by allangjohnson
That was quick - thanks.
So, if I write
(.+@){10,}
[email protected]
that would catch anything that was both sent to ten or more recipients AND was from
[email protected]?
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:01 am
by anniebrion
The from: test would go in a separate rule and set the rules to ALL instead of ANY.
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:03 am
by allangjohnson
That's what I was hoping to avoid, because I wanted that filter to be one line in a multiline filter that would be tripped in ANY condition was satisfied.
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:11 am
by anniebrion
It's difficult testing to: & from: in the same single rule as I have tried to do this in the past
The major issue is that email headers are not standardized enough, sometimes the to: comes before the from: other times it is the reverse, also sometimes a subject: is inbetween and sometimes not

Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:16 am
by allangjohnson
I understand. But am I correct that just putting a space between the two items makes it an "AND"?
So, using a different example, if the filter looks in the subject line for
hot cold
it would trip only if the subject line contained both words?
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:22 am
by anniebrion
NO putting a space is not an
AND.
The and is ie:
"1 or more characters" AND @ AND domain
(
fred OR fred)
AND @ AND domain
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:28 am
by allangjohnson
Sorry to be so slow, but why isn't
(fred|bert)@domain)
(fred OR fred) AND @ AND d AND o AND m AND a AND i AND n?
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 3:32 am
by anniebrion
It is but I couldn't be bothered to do all the ANDs

and it looks tidier than:
"1 or more characters"
AND @
AND d
AND o
AND m
AND a
AND i
AND n
Or
((f
AND r
AND e
AND d)
OR (b
AND e
AND r
AND t))
AND @
AND d
AND o
AND m
AND a
AND i
AND n
The last one makes the
AND and
ORs harder to spot.
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 4:11 am
by allangjohnson
So there isn't a way to have a single line that trips a filter if the subject line contains
hot AND cold
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 4:15 am
by anniebrion
allangjohnson wrote:So there isn't a way to have a single line that trips a filter if the subject line contains
hot AND cold
AJ
Yes there is but they have to be in the right order or you will need 2 rules
.* = Zero or more characters
\x20 = Space
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 4:18 am
by allangjohnson
or could it be in a single line as
hot.*cold|cold.*hot
?
AJ
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 4:21 am
by anniebrion
allangjohnson wrote:or could it be in a single line as
hot.*cold|cold.*hot
Simplistically yes, but that would match subject = "Hotdogs and coldfish"
Mabye:
Code: Select all
hot(\x20|$).*cold(\x20|$)|cold(\x20|$).*hot(\x20|$)
But I'm sure you get the idea.
Re: regex question - symbol for "and"
Posted: Sun Aug 08, 2010 4:24 am
by allangjohnson
I think I've got it. Thank you.
AJ