Re: Regex question - either starts, or has newline prefixing?

If I've understood correctly, you might want to try a look-behind assertion. Also, you can use a quantifier, capture and back-reference for your equals signs. It looks like you need to preserve your first capture as it will be obliterated by subsequent matches. Something like (not tested)

...
my $rxHeader = qr
   {(?x)
       (?: (?<=\A) | (?<=\n) )
       ([=]{2,})
       ([ your big character class ]+)
       \1
   };
...
while ( $post->{ post_message } =~ m{$rxHeader}g )
{
    my $section =
       get_section_code( $2 ,$post->{ post_message } );
    my @subheaders;
    while ( $section =~ m{$rxHeader}g )
    {
        push @subheaders, $2;
        ...
    }
    push @headers, { Section => $section, SubLoop => \@subheaders }
}
[download]

I hope I've understood correctly and this is useful.

Cheers,

JohnGG

Update: Fixed typo, s/behaind/behind/

Update 2: Fixed typo in code, s/{(?x}/{(?x)/

Comment on Re: Regex question - either starts, or has newline prefixing? Select or Download Code

Replies are listed 'Best First'.
Re^2: Regex question - either starts, or has newline prefixing? by ultranerds (Hermit) on Jul 13, 2009 at 13:41 UTC
Thanks - that gave me a fatal error though: Sequence (?x...) not recognized in regex; marked by <-- HERE in m/(?x <-- HERE k+/ Cheers Andy	[reply]
Re^3: Regex question - either starts, or has newline prefixing? by ultranerds (Hermit) on Jul 13, 2009 at 13:56 UTC
Never mind - I decided to take the slightly more long-winded route, and use: my @headers; my @tmp_split = split /\n/, $post->{post_message}; foreach (@tmp_split) { chomp; if ($_ =~ /^\=\=([a-z0-9_ &\[\]ÀÂÄàâäÇçÉÊÈËéêèëÏÌÎïìîÖÔÒöôòÜÛÙ +üûùA-Z?!;«»()"\s]+)\=\=$/) { my $header = $1; # print qq\|ok, got header of $1<br />\n\|; my $section = get_section_code($1,$post->{post_message}); my @tmp_2 = split /\n/, $section; my @subheaders; foreach my $tmp (@tmp_2) { # print qq\|checking sub-section for $header, line is: " +"\| chomp; if ($tmp =~ /^\=\=\=([a-z0-9_ &\[\]ÀÂÄàâäÇçÉÊÈËéêèëÏÌÎ +ïìîÖÔÒöôòÜÛÙüûùA-Z?!;«»()"\s]+)\=\=\=$/) { push @subheaders, $1; } } push @headers, { Section => $header, SubLoop => \@subheade +rs }; @subheaders = undef; @tmp_2 = undef; } } [download] Seems to work fine :) Cheers Andy	[reply] [d/l]
Re^3: Regex question - either starts, or has newline prefixing? by johngg (Canon) on Jul 13, 2009 at 19:28 UTC
Sorry, that's because there's a typo in my code `:-(` This `{(?x}` [download] Should have been this `{(?x)` [download] Cheers, JohnGG	[reply] [d/l] [select]