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Full Discussion: Rearrange fields of delimited text file
Top Forums Shell Programming and Scripting Rearrange fields of delimited text file Post 303003162 by durden_tyler on Friday 8th of September 2017 08:23:51 AM
Old 09-08-2017
Quote:
Originally Posted by andy2000
@rdrtx1: your solution doesn't work with more than 2 rows Smilie

a_13;a_2;a_1;a_10
13;2;1;10
23,22,11,100

---------- Post updated at 05:13 AM ---------- Previous update was at 05:10 AM ----------

Sorry, all your solution doesn't work with more than 3 rows:

a_13;a_2;a_1;a_10
13;2;1;10
23,22,11,100
...

Smilie
That's because you changed your delimiter character from ";" to "," (semi-colon to comma) in the last line of your data file.

If I keep the delimiter consistent for all the rows i.e. ";", then it does work:

Code:
$
$ cat data.txt
a_13;a_2;a_1;a_10
13;2;1;10
23,22,11,100
$
$ # Will not work because the last line cannot be split (as per the program's intention) on comma ","
$ perl -F';' -lane 'if ($. == 1){
                        %x = map{ $F[$_] => $_ } (0..$#F);
                        @s = map{ $x{$_} } sort { (split "_", $a)[1] <=> (split "_", $b)[1] } @F;
                    }
                    print join ";", map{ $F[$s[$_]] }(0..$#F);
                   ' data.txt
a_1;a_2;a_10;a_13
1;2;10;13
 
$
$ # After changing data.txt
$
$ cat data.txt
a_13;a_2;a_1;a_10
13;2;1;10
23;22;11;100
$
$ # Will work now because the delimiter is consistent for all rows
$
$ perl -F';' -lane 'if ($. == 1){
                        %x = map{ $F[$_] => $_ } (0..$#F);
                        @s = map{ $x{$_} } sort { (split "_", $a)[1] <=> (split "_", $b)[1] } @F;
                    }
                    print join ";", map{ $F[$s[$_]] }(0..$#F);
                   ' data.txt
a_1;a_2;a_10;a_13
1;2;10;13
11;22;100;23
$
$

Last edited by durden_tyler; 09-08-2017 at 09:38 AM..
 

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LEARN ABOUT HPUX

ypmatch

ypmatch(1)						      General Commands Manual							ypmatch(1)

NAME

       ypmatch - print values of selected keys in Network Information Service map

SYNOPSIS

       domain]

   Remarks
       The  Network  Information  Service  (NIS) was formerly known as Yellow Pages (YP).  Although the name has changed, the functionality of the
       service remains the same.

DESCRIPTION

       prints the values associated with one or more keys in a Network Information Service (NIS) map specified by mname.  The mname can be  either
       a mapname or a map nickname.  A map nickname is a synonym by which a NIS map can be referenced.

       If multiple keys are specified, the same map is searched for an occurrence of each key.	A match is made only when the case and length of a
       key is the same as that stored in the database.	No pattern matching is available.  If a key is not matched, a diagnostic message  is  pro-
       duced.

   Options
       recognizes the following command-line options:

	      Before printing the value associated with a key,
		      print  the  key  followed  by a colon This option is useful if the keys are not part of the values (as in a map), or so many
		      keys were specified that the output could be confusing.

	      Inhibit the translation of a map's
		      nickname to its corresponding mapname.  For example, fails because there is no map named whereas, is translated to

	      Specify a
		      domain other than the default domain, that is, the one returned by (see domainname(1)).

	      Display the
		      nickname for each NIS map.

AUTHOR

       was developed by Sun Microsystems, Inc.

SEE ALSO

       domainname(1), ypcat(1), ypserv(1M), ypfiles(4).

																	ypmatch(1)
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