2

I have text file contain strings like this 

abc,def,ghi,jkl,mno,pqr,stu,wxyz

I want to make it like this

1.abc
2.def
3.ghi
4.jkl
5.mno
6.pqr
7.stu
8.wxyz

how can i do that using sed?

  • Related: https://unix.stackexchange.com/questions/222218/to-add-line-numbers-in-every-line-using-shell-command – Julien Lopez Oct 10 '18 at 12:49
  • 1
    You say "strings" (plural). Can you give a larger example of the input file and what the output should look line? I'm assuming there could be multiple lines of these strings and that each should either be enumerated individually or as part of the overall sequence of entries. – Kusalananda Oct 10 '18 at 13:36

4 Answers4

7

You can do this 

echo abc,def,ghi,jkl,mno,pqr,stu,wxyz  | sed 's/,/\n/g' | nl -s "."

     1.abc
     2.def
     3.ghi
     4.jkl
     5.mno
     6.pqr
     7.stu
     8.wxyz
6

You can use GNU awk:

awk -v RS=',|\n' '{printf "%s.%s\n",NR,$0}' <<< "abc,def,ghi,jkl,mno,pqr,stu,wxyz"
oliv
  • 2,636
1

A couple of Perl approaches:

$ perl -F, -lne 'print ++$k.".$_" for @F' file
1.abc
2.def
3.ghi
4.jkl
5.mno
6.pqr
7.stu
8.wxyz

$ perl -pne 'chomp;s/([^,]+),*/++$k.".$1\n"/ge' file
1.abc
2.def
3.ghi
4.jkl
5.mno
6.pqr
7.stu
8.wxyz

And awk:

$ awk -F, '{for(i=1;i<=NF;i++){print i"."$i}}' file
1.abc
2.def
3.ghi
4.jkl
5.mno
6.pqr
7.stu
8.wxyz
terdon
  • 242,166
0
$ <file sed 's/,/\n/g' | sed '=' | paste -d . - -

1.abc
2.def
3.ghi
4.jkl
5.mno
6.pqr
7.stu
8.wxyz