> -----Original Message-----
> From: Paul Tremblay [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, August 01, 2002 12:17 PM
> To: [EMAIL PROTECTED]
> Subject: changing multiple flags and changing them back
>
>
> I have a series of flags that I need to change all at once, and then
> change back, and was wondering if I could use an array or hash to do
> this.
>
> I am parsing an RTF file, and when I find a footnote, I need
> to preserve
> the flags of the non-footnote text. So if I was in a table, I need to
> save the $in_table flag. Then when I am done with the footnote text, I
> need to re-set the $in_table flag to its previous state.
>
> So far I have this:
>
> sub start_footnote{
> $previous_in_table = $in_table;
> ...
> }
>
> sub end_footnone{
> $in_table = $previous_in_table;
> ...
> }
>
> This works find except I might have 15 or 20 flags I need to set or
> re-set. I would like to use an array like this:
>
> @flags = ($in_table, $after_cell, $in_paragraph);
>
> When I finish with my footnote, I will have an array of the previous
> values. Now how do I assign these values to the variables?
Just reverse the assignment:
($in_table, $after_cell, $in_paragraph) = @flags;
You might also consider using a simple stack:
my @stack;
sub start_footnote
{
push @stack, [ $in_table, $after_cell, $in_paragraph ];
...
}
sub end_footnote
{
($in_table, $after_cell, $in_paragraph) = @{ pop @stack };
...
}
This will support multiple levels, if that is required (i.e. footnote
within a footnote).
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