Add tag

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Add tag by moritz (Cardinal) on Sep 01, 2009 at 13:02 UTC
It would help if you put the HTML tags you're talking about in `<code>...</code>` tags too so we don't have to guess. See also: Add at the begining of text which seems to discuss similar things. All in all I think that HTML manipulation via regexes is not a good idea - maybe you want to use a BBCode module like Parse::BBCode to achieve your end goal, whatever it is? Perl 6 - links to (nearly) everything that is Perl 6.	[reply] [d/l]
Re: Add tag by Sewi (Friar) on Sep 01, 2009 at 13:36 UTC
`$Data = <DATA>; $Data =~ s/(\[NEW\].+?)\<?(\n\[)/$1<p>$2/sg;` [download] This looks for a NEW block followed by something (. = match all chars, + = match 1 or more times). Next there may be a < (? = 0 or 1 matches) and then we expect a newline and a [ (beginning of the next OLD or NEW block). The NEW block including "something" (which is all the text of this block) is put in ( ) which makes them accessible as $1, so is the last part (newline + [ ). They're merged with a <p>. Finally, /s treats the whole data as a single line so that the .+ - match will also match newlines and the g repeates this replacement until there is no match left. All this assumes Linux, for Windows newlines, add a \r before the \n. If you got more data than you would like to keep and process in RAM, it's a little bit longer, you need to keep the last line before printing: #!/usr/bin/perl while(<DATA>){ if (/^(\[\w+\])/) { # New block starts $line =~ s/\<$/<p>/ if $f eq 'NEW'; # Replace the < by <p> for NEW blocks only $f = $1; } defined($line) and print $line; # Print the last line $line = $_; # keep for next run # Save this line } print $line; # Print last line __DATA__ [NEW] Dear Carolyn: My husband and I divorced after 42 years. It didn't tak +e long for him to find a replacement, but I was happy for him at the time.< them and let my grandchildren dig through her purse as if she were the +ir grandmother.< [OLD] [download] This loops through your lines and remembers the current line. If the current line is a ... block, the remembered line is modified as you requested: a <p> is added and the < is removed. For the last step, the remembered and maybe modified line is being printed. If you want the <p> only at NEW bondaries but also want to get rid of the < on every ... boundary, split the regexp: `$line =~ s/\<$//; # Remove < $line .= '<p>' if $f eq 'NEW'; # Add <p> for NEW blocks only` [download] (I didn't try this code myself, so there may be typos.)	[reply] [d/l] [select]
Re^2: Add tag by Anonymous Monk on Sep 01, 2009 at 16:04 UTC
`#!/usr/bin/perl while(<DATA>){ if (/^(\[\w+\])/) { $f = $1; } elsif ($f =~ m/\[NEW\]/) { # $_ =~ s/\[NEW\](.){\w}/<p>$1<\/p>/g; $_=~ s/<$/<\/p><p>/g; s/(\[NEW\].+?)\<?(\n\[)/$1<p>$2/xsg; print $_; } } __DATA__ [NEW] Dear Carolyn: My husband and I divorced after 42 years. It didn't tak +e long for him to find a replacement, but I was happy for him at the time.< them and let my grandchildren dig through her purse as if she were the +ir grandmother.< [OLD]` [download] The above code does not work	[reply] [d/l]