need regexp for "everything except"

[Kenadi Moore]

This will be an easy one for you regexp pros, which I definitely am not…

I need an regexp that will look at a string like to following:

%label%Stuff that is here and different every time

and return everything except %label%

Thanks,

Kenadi Moore

OhioHealth

Topic

[Bill Bertera]

I think this is what you’re looking for:

hcitcl>set a “%label%Stuff other than label”

hcitcl>echo $a

%label%Stuff other than label

hcitcl>regexp {(%label%)(.*)} $a one two three

1

hcitcl>echo $three

Stuff other than label

hcitcl>

[/b]

[Kenadi Moore]

That works but can someone explain how the one two three part works in general.  I see the format for regexp is:

regexp ?flags? pattern string ?match sub1 sub2 …?

How do you know if there will be a sub1, sub2 etc and how do you know what they will represent?

Thanks,

Kenadi

[Bill Bertera]

match will be the entire pattern that was matched.

sub1, sub2, etc… will contain what is put in ().

I put 2 pairs of (), so $one will be the entire pattern ($a), $two will contain %label%, and $three is the string you’re looking for. if there was another () with more of the pattern that would be $four (if ‘four’ was added to the command).

[Author]

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