Regexp help

Not sure wheree you are starting from but something like this may help.

using the field as the source and something like this as a preproc.

This will match GUID={ and then (not a right curly brace) between the parentheses.  The ‘–>’ is just a variable name for the complete match and the 1 or match of what’s between the parentheses goes into xlateOutVals

regexp — {GUID={([^}]+)} [lindex $xlateInVals 0] –> xlateOutVals

Hope this helps….In between the parentheses is one or more characters that is not a right curly brace…..

Works fine but will give you fits if there happens to be a space in the field or the regexp does not match.

There is also no need to escape the braces

I would do it like:

if {[regexp — {GUID={([^}]+)} [lindex $xlateInVals 0] {} var]} {

        set xlateOutVals

}

This way if the regexp does not match xlateOutVals will be equal xlateInVals

Thanks Charlie.  It is much cleaner and handles those pesky spaces better.

I have an application where I can only enter a regular expression.  I need to exclude only one value but have found it to be challenging.  I want all numbers except one. I thought I could use something like lookahead 20 and don’t match if next character is an 8 with no additional following characters(digits). Any help would be appreciated.

Let’s say 208 so I need to include everything except 208.

(?:0d*|1d*|2ds+|20[0-79]|20[0-79]d+|208d+|2[1-9][0-9]d*|3d*|4d*)

Confusing Keith.

Is it always the last number to exclude.  Will these numbers be embedded in a string?  Is there a better example?

They are code values so the text will include

ERROR

or

ERROR-

I am aware that numbers could be up to 4 digits so far.

Are you saying you want the whole string unless the number is 208?

Yes

ERROR-20 would also be valid.

Then can’t you say something like:

if {[regexp -nocase — {ERROR-208} $str] {

     set ERR “”

} else {

     set ERR $txt

}

Am I missing something?

Unfortunately, I can only enter a regular expression.

Hmmm  have to think about that

A negative look ahead seems to work for me

{ERROR-(?!208).*$}

Will match any string with ERROR-#### some text except when it is 208

If you need more send me an e-mail.  No need to fo back and forth here 🙂

charlie.bursell@laswon.com

If I have 20 and the next digit is 8 and a word boundary, don’t match.  If I have 208 and more digits, do match.  Haven’t figured out how to write that yet….

{ERROR-(?!208M).*$}

Thanks…  I think that last one might do it.

Charlie, would you be willing to do a class on Regular Expressions??

That might be worth the outrageous price for the yearly user group…

I cover regular expressions in Level 3 although maybe not to the detail you want.

There are a *LOT* of regular expression tutorial on the web