Thank you to everyone I now have a much better understanding of parsing
lines,
Robb
PS could you recommend any good starter perl books?
On Fri, 2002-12-27 at 16:50, R. Joseph Newton wrote:
> my $InString = "<programme start="20021221235500 UTC" stop="20021222001000 UTC"
> channel="carlton.com">"
> if ($InString =~ /\bprogramme start=\"(.*)\" stop=\"(.*)\" channel=\"(.*)\"/) {
> my $programme = $1;
> my $start = $2;
> my $channel = $3;
> }
> What happens here is that the parentheses around each sought-after value set it to
>one of the built-in regex variables--$1, $2...$n, in order from their appearance in
>the the comparison string. Thus you can call them back to assign them to program
>variables. I'm not sure about the scoping for these special variables, but so far
>I've had success using them within the block for which the regex is part of the
>control expression.
>
> This is of course, not a generalized solution. It presupposes that you will always
>be using this function to parse tags of that exact format. The other suggestions
>offeredprobably provide somewhat greater generality. I offer this because it shows a
>closer connection to the material in hand. I find that I find it much easier to
>debug when I can look at the code and know exactly what the string I'm trying to
>crunch should look like.
>
> Joseph
>
> Robert Boardman wrote:
>
> > Hi all
> > I'm attempting to write my first perl script to parse a couple of lines
> > and would appreciate some help extracting data from the folloing example
> >
> > Data:
> > <programme start="20021221235500 UTC" stop="20021222001000 UTC"
> > channel="carlton.com">
> >
> > I want to extract 0021221235500 and 20021222001000 and carlton.com
> >
> > I have tried to to use pattern matching using =~ etc but cannot seem to
> > get the pattern correct
> > anybody any ideas?
> >
> > Robb
> >
> > --
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