use SED to replace repeat statements Post: 302357388

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Top Forums Shell Programming and Scripting use SED to replace repeat statements Post 302357388 by durden_tyler on Tuesday 29th of September 2009 03:45:24 PM

09-29-2009

Registered User

Quote:

Originally Posted by watsup

... that read a input file that had same statement repeatedly to replace only 2nd & 5th time repeated statements (ex: This is UNIX forum) with another statement ( UNIX forum threads in Shell programming) with out modifying 1st,3,4th repeated statements.
...

With no clue as to what your data looks like, I shall assume that yours is the simplest case where the string to be replaced occurs all by itself in a line.
Thus -

Code:

$
$ cat -n f3
     1  This is line 1. Some stuff here.
     2  This is UNIX. And some more stuff here. The weather's good.
     3  This is UNIX forum.
     4  Fourth line here.
     5  This is UNIX forum.
     6  And some more.
     7  This is UNIX forum.
     8  The line that does not have the target string.
     9  This is UNIX forum.
    10  Some filler stuff here.
    11  And finally -
    12  This is UNIX forum.
    13  The end.
$
$
$ ##
$ perl -lne 'BEGIN {$from="This is UNIX forum.";
>                   $to="==> UNIX forum threads in Shell programming <=="}
>            if (/$from/) {
>              $i++;
>              if ($i == 2 or $i == 5){print $to} else {print}
>            } else {print}' f3
This is line 1. Some stuff here.
This is UNIX. And some more stuff here. The weather's good.
This is UNIX forum.
Fourth line here.
==> UNIX forum threads in Shell programming <==
And some more.
This is UNIX forum.
The line that does not have the target string.
This is UNIX forum.
Some filler stuff here.
And finally -
==> UNIX forum threads in Shell programming <==
The end.
$
$

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LEARN ABOUT XFREE86

alcc

ALCC(1) 							  aMule utilities							   ALCC(1)

NAME

       alcc - text based eD2k links calculator for aMule

SYNOPSIS

       alcc [-p] [-v] <inputfiles_list>

       alcc [-h]

DESCRIPTION

       Compute the eD2k links of all the input files given in the <inputfiles_list> (There can be one or more files).

       [ -p, --parthashes ]
	      Compute and add part hashes to the computed eD2k links.

       [ -h, --help ]
	      Prints a short usage description.

       [ -v, --verbose ]
	      Be verbose - show also calculation steps.

REPORTING BUGS

       Please report bugs either on our forum (http://forum.amule.org/), or in our bugtracker (http://bugs.amule.org/).  Please do not report bugs
       in e-mail, neither to our mailing list nor directly to any team member.

COPYRIGHT

       aMule and all of its related utilities are distributed under the GNU General Public License.

SEE ALSO

       alc(1), amuled(1), amulecmd(1), amuleweb(1), cas(1), ed2k(1), wxcas(1), xas(1)

AUTHOR

       This manpage was written by Vollstrecker <amule@vollstreckernet.de>

aMule eD2k links calculator					   November 2011							   ALCC(1)

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