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Replace a line with a separate line in code

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# 1  
Old 02-19-2010
Replace a line with a separate line in code
I have a bunch of files that are like this:

Code:
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<h1>Header</h1>
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<h1>Unique</h1>
<html stuffs>HTML STUFFS</endhtmlstuffs>

And Here's what I'd like it to look like:

<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<h1>Unique Header</h1>
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<htmlstuffs>HTML STUFFS</endhtmlstuffs>

I generally use perl for find and replace stuff, but I don't know how to get it to look for the next instance and replace it.

Any help would be greatly appreciated. Sorry if this is posted elsewhere. I did search first, but couldn't find an answer. Thanks
# 2  
Old 02-19-2010
Hello, kason:

Code:
$ cat data
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<h1>Header</h1>
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<h1>Unique</h1>
<html stuffs>HTML STUFFS</endhtmlstuffs>

$ awk -f kason.awk data
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<h1>Unique Header</h1>
<htmlstuffs>HTML STUFFS</endhtmlstuffs>
<html stuffs>HTML STUFFS</endhtmlstuffs>

$ cat kason.awk 
BEGIN { FS="<[^>]*>"; }

/^<h1>/ {
    if (buffering) {
        print "<h1>"$2" "h"</h1>";
        h="";
        if (buf) {
            printf("%s", buf);
            buf="";
        }
        buffering=0;
    }
    else {
        h=$2;
        buffering=1;
    }
    next;
}

buffering {
    buf=buf $0 RS;
    next;
}

{ print; }

Regards,
Alister
Last edited by alister; 02-19-2010 at 09:33 PM..
# 3  
Old 02-27-2010
Try this in Perl

Code:
use strict;
use warnings;


open(FH,"file") || die "Can't open the file";
my @line_arr;
my $check=0;
my $i=0;

while(<FH>)
{
        my $line=$_;
        chomp($line);
        if($line=~/^<h1>(.*)<\/h1>$/)
        {
                $line_arr[$i++]=$1;
        }
}
my @val=reverse @line_arr;
seek(FH,0,0);

while(<FH>)
{
        if(/^(<h1>)(.*)(<\/h1>)$/)
        {
                if($check==0)
                {
                        print $1."@val".$3."\n";
                        $check=1;
                }
        }
        else
        {
                print $_;
        }
}

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