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Shell Programming and Scripting

Regular Expression

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# 1  
Old 07-08-2012
Regular Expression
Hello,

I want to extract text between <td class="di_resultscolumnheader"> and </td>.
I wrote the below code to extract text. But I am able to extract the text for the first match only.
Can some one help me in this?

Thanks in advance.

Code:

Code:
if ($line =~ /<td class="di_resultscolumnheader">(.*?)<\/td>/g)
{
	print $1,"\n";
}

Sample Input:

Code:
<td class="di_resultscolumnheader">Object</td><td class="di_resultscolumnheader">Precipitant</td><td class="di_resultscolumnheader">Therapeutic&nbsp;Class</td>

Sample Output:

Code:
Object
Precipitant
Therapeutic&nbsp;Class

Last edited by Scrutinizer; 07-09-2012 at 06:38 AM.. Reason: code tags
# 2  
Old 07-08-2012
You could try something like this:

Code:
sed 's!<td class="di_resultscolumnheader">.*</td>!&!g; s!</td>!\n!g; s!<td class="di_resultscolumnheader">!!g;s/\n$//; /^$/d; ' input-file >output-file

This doesn't handle the case where there might be text between </td> and <td...>. A simple, but slightly longer, sed would be needed to deal with that.
# 3  
Old 07-09-2012
Code:
$ nawk -F"[<>]" '{for(i=1;i<=NF;i++)if($i~/resultscolumnheader/){print $(i+1)}}' input.txt
Object
Precipitant
Therapeutic&nbsp;Class

# 4  
Old 07-09-2012
Code:
# sed -n '/^<td class="di_resultscolumnheader">/,/<\/td>/{s///;s/<td class="[^ ]*">//g;s//\n/g;:a;s/<\/td>/\n/;/td.*td/ta;s/<\/td>$//;p}' infile
Object
Precipitant
Therapeutic&nbsp;Class

# 5  
Old 07-09-2012
Code:
awk '/^td class="di_resultscolumnheader"/{print $2}' RS=\< FS=\> infile

# 6  
Old 07-09-2012
Perl:
Code:
while (/<td class="di_resultscolumnheader">(.*?)<\/td>/g)
{
    print "$1\n";
}

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