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Full Discussion: Perl inline replace only on 1st line
Top Forums Shell Programming and Scripting Perl inline replace only on 1st line Post 302710449 by sol_nov on Thursday 4th of October 2012 01:06:08 PM
Old 10-04-2012
CPU & Memory Perl inline replace only on 1st line
I have file file_1.out which contains the data below
Code:
<tr> MAIL # 1 TO src_1 </tr> 
<tr><td class="hcol">col_id</td> <td class="hcol">test_dt</td> <td class="hcol">user_type</td> <td class="hcol">ct</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">A</td> <td class="bwcol">15</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">B</td> <td class="bwcol">90</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">C</td> <td class="bcol">6</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">D</td> <td class="bcol">4</td></tr>

How can I replace only the first line with the following:

Code:
<tr><td colspan="4" class="hcol"> MAIL # 1 TO src_1 </td></tr> 
<tr><td class="hcol">col_id</td> <td class="hcol">test_dt</td> <td class="hcol">user_type</td> <td class="hcol">ct</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">A</td> <td class="bwcol">15</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">B</td> <td class="bwcol">90</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">C</td> <td class="bcol">6</td></tr> 
<tr><td class="bcol">1</td> <td class="bcol">2012-09-20</td> <td class="bcol">D</td> <td class="bcol">4</td></tr>

For now I am replaciong inline:
Code:
find file_1.out -type f | xargs perl -pi -e 's/<tr> MAIL #/<tr><td colspan="4" class="hcol"> MAIL #/gi; s/ <\/tr>/<\/td><\/tr>/gi'

But I dont want to use the MAIL tag in the command, if it appears agian some where in the file it does'nt work.

Thanks for your help.
Last edited by Scott; 10-04-2012 at 02:30 PM.. Reason: Please use code tags for code.
 

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