[Gambas-user] Select Case problem

[Tobias Boege]

On Thu, 28 Mar 2013, Bruce wrote:
> On Thu, 2013-03-28 at 17:05 +1030, Bruce wrote:
> > Hi,
> > 
> > I am trying to parse a text file that contains key,value pairs like:
> >         Name=Malarky
> >         Size=10
> >         BackImage[N]=sometext
> >         FrontImage[S]=sometext
> >         etc
> > using a construct like
> >         For idx = 0 to sourcearray.max
> >           Select Upper(Split(SourceArray[idx],"+")[0])
> >             Case "NAME"
> >               blah blah
> >             Case "SIZE"
> >               blah blah
> >             Case Like "BACKIMAGE[*]"
> >               blah blah
> >             Case Like "FRONTIMAGE[*]"
> >               blah blah
> >           End Select
> >         Next
> > 
> > This fails because Case Like "BACKIMAGE[*]" is being interpreted as a
> > regular expression where I need to escape the regexp "[]" meaning.
> > 
> > Trying to use escapes like 
> >   Case Like "BACKIMAGE\[*\]" 
> > fails as \[ is an unknown escape sequence.
> > 
> > Any clues?
> > 
> > tia
> > Bruce
> > 
> 
> Sorry, I have over simplified that.  I also need to discern lines like
>         BACKIMAGE[*]
> from lines like
>         BACKIMAGE[*][*]
> so 
>         Like "BACKIMAGE*"
> wont work.
> 
> B

OK. If the lines above (from your most recent mail) are literal strings,
then you'll need something like:

Case Like "BACKIMAGE\\[*\\]" ' The compiler transforms "\\" to a literal "\"
                             ' so that you end up with the right expression.

to match "BACKIMAGE[*]" but since you want to distinguish between, e.g.
"BACKIMAGE[*]" and "BACKIMAGE[*][*]" - why would you use "Case Like", i.e. a
regular expression at all? These are distinct strings you want to keep
distinct, no need to group them by regular expressions then?

Regards,
Tobi