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Hi Januk,
On 28 August 2000 at 12:26:37 GMT -0700 (which was 20:26 where I
live) [EMAIL PROTECTED] wrote and made these points on the subject
of "Spam filter strings?":
>> For a simple OR function, would we have:
>> '[str A]|[str B]'
JA> I think you may be getting confused here. You don't need the
JA> apostrophes or the square brackets. Just type your strings in.
JA> This is why I think the | method for ORing to strings can be
JA> ambiguous.
.. or you do. The help is also ambiguous here. Square brackets are
used to delimit contiguous strings. Apostrophes are supposed to be
used to delimited complete arguments which contain special characters.
It all adds to the ambiguity.
>> is it OK to put spaces outside brackets as:
>> ' [str A] | [str B] '
JA> I'm not sure about the spaces. Again, this is another reason I find
JA> the | method to be ambiguous.
I am pretty sure about the spaces - they'll mess it up for sure -
especially when used in conjunction with apostrophes and square
brackets.
>> (I understand the ' chr is needed - true?)
JA> False.
... or true, depending which bit of the Help file you're reading.
z>>>>>> (A or B or (C and D and (E or F)))?
>> The problem I see here is getting AND and OR to work in a *single*
>> expression. How does one do that? Is it possible to write the above
>> as a single, one-line expression?
JA> As far as I know, no. In a *single* string set, you could only do the
JA> C and D and (E or F). See my example in a previous post to this
JA> thread.
Absolutely. ZTrader - Januk's example was *crystal* clear on this
point.
>> The suggeston for implementing this split up the parts into simple
>> strings that could be entered as AND's or OR's. If one has an
>> expression that needs an AND or an OR *within* the string,
JA> Just be careful here. You can not have a single string that says
JA> something like,
JA> (Tom or Jane) Doe
JA> Instead you would need to break it up into either
JA> Tom|Jane AND Doe
JA> or
JA> Tom Doe|Jane Doe
... which could end up as [Tom Doe]|[Jane Doe].
>> it seems critical to have exactly the right characters ['",etc to
>> make it work. I am trying to understand how to include these chrs
>> correctly so it works.
JA> See above.
.. or refer to the "Help" references on 'Using special syntax in
signal strings'.
For the sake of clarity, here is some of the help text with the
salient points underlined:
Pipe character �|� means that signal string contains two
alternatives. For example, string John|Jack means that search will
^^^^^^^^^
be successful if John or Jack (or both) will be found in the
specified location.
Square brackets [ ] mean that text embraced by them must be
searched as a phrase. i.e. search for [Jack] will be successful
for sentence �Jack is a good man�, but not for � Jackson guitars
are very good for beginners�.
Text embraced in quotation marks is case-sensitive, i.e.
�Internet� will be found in the sentence �The Internet is growing
very rapidly� but not in �InTeRnEt RuLeZ�
The text containing special characters mentioned above, must be
^^^^^^^
embraced in single quotes, like this: �["New" generation mailing
^^^^^^^^^^^^^^^^^^^^^^^^^^^
list]�
- --
Cheers,
.\\arck
>< Marck D. Pearlstone | Moderator TBUDL / TBBETA ><
>< PGP Key ID: 0x929DCDA0 | www: http://www.silverstones.com ><
>< PGP Key: <mailto:[EMAIL PROTECTED]?Body=GET%20MARCKKEY> ><
If a man is standing in the middle of the forest speaking
and there is no woman around to hear him...is he still wrong?
____________________________________________________________________
TB! v1.46 Beta/3 S/N 14F4B4B2 on Windows 98 4.10 Build 1998
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