Rows into columns? Post: 302427491

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Top Forums Shell Programming and Scripting Rows into columns? Post 302427491 by DeCoTwc on Sunday 6th of June 2010 04:47:01 PM

06-06-2010

Registered User

I'm sorry to keep clogging people's posts. I've been practicing trying to find pure shell (or close to) solutions to problems, so while this may not be the most practical solution for your needs, I'd appreciate if anyone could tell me if there's a better way I could have solved this guys problem than what I came up with:

Code:

(23:43:55\[D@DeCoBox15)
[~]$ cat input
Joe Smith jsmith 43234 bill1;bill2;read;read2;schedule
Andy Summers asummers 11232 bill1;read
Beth McConnel bmconnel 43443 read;read2;schedule;bill
Susan Fowler sfowler 09332 bill1;read;schedule

(01:16:30\[D@DeCoBox15)
[~]$ cat mysolution
#!/bin/bash
    tr ";" "\n" < $1 | while read line; do
        if [[ $(echo $line|wc -w) -gt 1 ]]; then
            array=($line);
            echo "${array[*]}";
        else
            echo "${array[0]} ${array[1]} ${array[2]} ${array[3]} $line";
        fi;
    done

(01:16:54\[D@DeCoBox15)
[~]$ ./mysolution input
Joe Smith jsmith 43234 bill1
Joe Smith jsmith 43234 bill2
Joe Smith jsmith 43234 read
Joe Smith jsmith 43234 read2
Joe Smith jsmith 43234 schedule
Andy Summers asummers 11232 bill1
Andy Summers asummers 11232 read
Beth McConnel bmconnel 43443 read
Beth McConnel bmconnel 43443 read2
Beth McConnel bmconnel 43443 schedule
Beth McConnel bmconnel 43443 bill
Susan Fowler sfowler 09332 bill1
Susan Fowler sfowler 09332 read
Susan Fowler sfowler 09332 schedule

I think I could have eliminated the tr if I changed the IFS and tweaked the way I set the names, but this is the best I could come up with.

Damn, after trying out Bartus's solution, I just feel silly now...

Code:

[~]$ time awk '{n=split($5,a,";");for(i=1;i<=n;i++){print $1,$2,$3,$4,a[i]}}' pxe > /dev/null

real    0m0.088s
user    0m0.000s
sys     0m0.031s

(23:49:50\[D@DeCoBox15)
[~]$ time ./tst > /dev/null

real    0m2.338s
user    0m0.391s
sys     0m0.516s

Last edited by DeCoTwc; 06-06-2010 at 07:17 PM.. Reason: completely boinked it the first time

DeCoTwc

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LEARN ABOUT MOJAVE

tabs

TABS(1) 						    BSD General Commands Manual 						   TABS(1)

NAME

     tabs -- set terminal tabs

SYNOPSIS

     tabs [-n | -a | -a2 | -c | -c2 | -c3 | -f | -p | -s | -u] [+m[n]] [-T type]
     tabs [-T type] [+[n]] n1[,n2,...]

DESCRIPTION

     The tabs utility displays a series of characters that clear the hardware terminal tab settings then initialises tab stops at specified posi-
     tions, and optionally adjusts the margin.

     In the first synopsis form, the tab stops set depend on the command line options used, and may be one of the predefined formats or at regular
     intervals.

     In the second synopsis form, tab stops are set at positions n1, n2, etc.  If a position is preceded by a '+', it is relative to the previous
     position set.  No more than 20 positions may be specified.

     If no tab stops are specified, the ``standard'' UNIX tab width of 8 is used.

     The options are as follows:

     -n      Set a tab stop every n columns.  If n is 0, the tab stops are cleared but no new ones are set.

     -a      Assembler format (columns 1, 10, 16, 36, 72).

     -a2     Assembler format (columns 1, 10, 16, 40, 72).

     -c      COBOL normal format (columns 1, 8, 12, 16, 20, 55)

     -c2     COBOL compact format (columns 1, 6, 10, 14, 49)

     -c3     COBOL compact format (columns 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 67).

     -f      FORTRAN format (columns 1, 7, 11, 15, 19, 23).

     -p      PL/1 format (columns 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61).

     -s      SNOBOL format (columns 1, 10, 55).

     -u      Assembler format (columns 1, 12, 20, 44).

     +m[n], +[n]
	     Set an n character left margin, or 10 if n is omitted.

     -T type
	     Output escape sequence for the terminal type type.

ENVIRONMENT

     The LANG, LC_ALL, LC_CTYPE and TERM environment variables affect the execution of tabs as described in environ(7).

     The -T option overrides the setting of the TERM environment variable.  If neither TERM nor the -T option are present, tabs will fail.

EXIT STATUS

     The tabs utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     expand(1), stty(1), tput(1), unexpand(1), termcap(5)

STANDARDS

     The tabs utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY

     A tabs utility appeared in PWB UNIX.  This implementation was introduced in FreeBSD 5.0.

BUGS

     The current termcap(5) database does not define the 'ML' (set left soft margin) capability for any terminals.

BSD
								   May 20, 2002 							       BSD

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