Question about regular expressions
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Manfred Brau
#1 / 6
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 Question about regular expressions Hello Scripters, I try to find a regular expression pattern, which excludes the "."
So, I want to have a match only, if there are no "." (point) characters
in the string. I saw a lot samples and have some (small) experience
with regex, but I am not able to exclude something (not only the point)!!!
The pattern "[^.]" and "[^\.]" are not working, like I (!!) expect. But
this
is not restricted to the point, if I have a string "abcdef", I wish only to
get a match, if there is no "c" in it, independent from it's position.
What is wrong with my thinking??
Am looking for a solution and spent a lot of time to find more real
samples in the web, but found not much for VBScript! Or is there
a good book out in the market??
May be, here is some help??
Best regards,
Manfred Braun
(Private)
Lange Roetterstrasse 7
D68167 Mannheim
Germany
(Remove the anti-spam-underscore to mail me!)
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| Wed, 24 Jul 2002 03:00:00 GMT |
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Dale Strickland-Clar
#2 / 6
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Question about regular expressions Patterns can only search for things which *are* there. You can't match against things which are not. You can search for a set of characters which excludes some characters, such
as [^a-h] means look for something which isn't a-h. It doesn't mean succeed
if you can't find a-h.
What you need to do is search for the character you want to ensure *isn't*
in the string and use the success of the search to indicate failure, if you
see what I mean.
--
Dale Strickland-Clark
Out-Think Ltd, UK
Business Technology Experts
Quote: > Hello Scripters, > I try to find a regular expression pattern, which excludes the "."
> So, I want to have a match only, if there are no "." (point) characters
> in the string. I saw a lot samples and have some (small) experience
> with regex, but I am not able to exclude something (not only the point)!!!
> The pattern "[^.]" and "[^\.]" are not working, like I (!!) expect. But
> this
> is not restricted to the point, if I have a string "abcdef", I wish only
to
> get a match, if there is no "c" in it, independent from it's position.
> What is wrong with my thinking??
> Am looking for a solution and spent a lot of time to find more real
> samples in the web, but found not much for VBScript! Or is there
> a good book out in the market??
> May be, here is some help??
> Best regards,
> Manfred Braun
> (Private)
> Lange Roetterstrasse 7
> D68167 Mannheim
> Germany
> (Remove the anti-spam-underscore to mail me!)
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| Wed, 24 Jul 2002 03:00:00 GMT |
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Robi
#3 / 6
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Question about regular expressions I suggest diferent aproach. if instr(MyString,".") = 0 Then
... ' your code here
end if
Robert Knaus
Quote: > Hello Scripters, > I try to find a regular expression pattern, which excludes the "."
> So, I want to have a match only, if there are no "." (point) characters
> in the string. I saw a lot samples and have some (small) experience
> with regex, but I am not able to exclude something (not only the point)!!!
> The pattern "[^.]" and "[^\.]" are not working, like I (!!) expect. But
> this
> is not restricted to the point, if I have a string "abcdef", I wish only
to
> get a match, if there is no "c" in it, independent from it's position.
> What is wrong with my thinking??
> Am looking for a solution and spent a lot of time to find more real
> samples in the web, but found not much for VBScript! Or is there
> a good book out in the market??
> May be, here is some help??
> Best regards,
> Manfred Braun
> (Private)
> Lange Roetterstrasse 7
> D68167 Mannheim
> Germany
> (Remove the anti-spam-underscore to mail me!)
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| Wed, 24 Jul 2002 03:00:00 GMT |
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Manfred Brau
#4 / 6
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Question about regular expressions Hi Dale and thanks for your response. I tried this way too (there are some small
samples in the docs), but could'nt understand/realize that......From your
sample below, it becomes valid for each other character at any position, so,
if I would have a search string like "imho", the result would even become
true, so I found no solution so far.
Thanks and regards,
Manfred
Quote: > Patterns can only search for things which *are* there. You can't match > against things which are not. > You can search for a set of characters which excludes some characters,
such
> as [^a-h] means look for something which isn't a-h. It doesn't mean
succeed
> if you can't find a-h.
> What you need to do is search for the character you want to ensure *isn't*
> in the string and use the success of the search to indicate failure, if
you
> see what I mean.
> --
> Dale Strickland-Clark
> Out-Think Ltd, UK
> Business Technology Experts
> > Hello Scripters,
> > I try to find a regular expression pattern, which excludes the "."
> > So, I want to have a match only, if there are no "." (point) characters
> > in the string. I saw a lot samples and have some (small) experience
> > with regex, but I am not able to exclude something (not only the
point)!!!
> > The pattern "[^.]" and "[^\.]" are not working, like I (!!) expect. But
> > this
> > is not restricted to the point, if I have a string "abcdef", I wish only
> to
> > get a match, if there is no "c" in it, independent from it's position.
> > What is wrong with my thinking??
> > Am looking for a solution and spent a lot of time to find more real
> > samples in the web, but found not much for VBScript! Or is there
> > a good book out in the market??
> > May be, here is some help??
> > Best regards,
> > Manfred Braun
> > (Private)
> > Lange Roetterstrasse 7
> > D68167 Mannheim
> > Germany
> > (Remove the anti-spam-underscore to mail me!)
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| Thu, 25 Jul 2002 03:00:00 GMT |
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Manfred Brau
#5 / 6
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Question about regular expressions Hello Robi, thanks so far, but I wished to go to a more generalized way with
expressions, "including" and "excluding", but found no solution so far.
Best regards,
Manfred
Quote: > I suggest diferent aproach. > if instr(MyString,".") = 0 Then
> ... ' your code here
> end if
> Robert Knaus
> > Hello Scripters,
> > I try to find a regular expression pattern, which excludes the "."
> > So, I want to have a match only, if there are no "." (point) characters
> > in the string. I saw a lot samples and have some (small) experience
> > with regex, but I am not able to exclude something (not only the
point)!!!
> > The pattern "[^.]" and "[^\.]" are not working, like I (!!) expect. But
> > this
> > is not restricted to the point, if I have a string "abcdef", I wish only
> to
> > get a match, if there is no "c" in it, independent from it's position.
> > What is wrong with my thinking??
> > Am looking for a solution and spent a lot of time to find more real
> > samples in the web, but found not much for VBScript! Or is there
> > a good book out in the market??
> > May be, here is some help??
> > Best regards,
> > Manfred Braun
> > (Private)
> > Lange Roetterstrasse 7
> > D68167 Mannheim
> > Germany
> > (Remove the anti-spam-underscore to mail me!)
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| Thu, 25 Jul 2002 03:00:00 GMT |
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T-ma
#6 / 6
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Question about regular expressions howdy-- since . matches everything, you're not going to have any luck with [^.] unless you are matching an empty string. But in general,
So to get a string only if it excludes the character 'c' :
good=(/c/g.test(stringGood)) ? "no good":stringGood;
T
Quote:
> Hello Scripters, > I try to find a regular expression pattern, which excludes the "."
> So, I want to have a match only, if there are no "." (point) characters
> in the string. I saw a lot samples and have some (small) experience
> with regex, but I am not able to exclude something (not only the point)!!!
> The pattern "[^.]" and "[^\.]" are not working, like I (!!) expect. But
> this
> is not restricted to the point, if I have a string "abcdef", I wish only to
> get a match, if there is no "c" in it, independent from it's position.
> What is wrong with my thinking??
> Am looking for a solution and spent a lot of time to find more real
> samples in the web, but found not much for VBScript! Or is there
> a good book out in the market??
> May be, here is some help??
> Best regards,
> Manfred Braun
> (Private)
> Lange Roetterstrasse 7
> D68167 Mannheim
> Germany
> (Remove the anti-spam-underscore to mail me!)
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| Sat, 27 Jul 2002 03:00:00 GMT |
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