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Full Discussion: Search comppare replace (substr/lppad)
Top Forums Shell Programming and Scripting Search comppare replace (substr/lppad) Post 302973133 by Aia on Sunday 15th of May 2016 01:18:35 AM
Old 05-15-2016
Code:
$ cat sample.txt
AT    0001      000000000100000000000
BE    4         000000000000030000000
DE    0055      000004000000000000000
FR    0         000000000000000110000
CZ    003       000330000000050000000

If the range is 7 to 10, blue 10-7, red 7-1:
Code:
$ perl -pe '$sub = substr $_, 6, 4 and $padd = sprintf "%04d", $sub and s/$sub/$padd/' sample.txt
AT    0001      000000000100000000000
BE    0004      000000000000030000000
DE    0055      000004000000000000000
FR    0000      000000000000000110000
CZ    0003      000330000000050000000

If the range is 48 to 51, blue 51-48, red 48-1:
Code:
$ perl -pe '$sub = substr $_, 47, 3 and $padd = sprintf "%04d", $sub and s/$sub/$padd/' showdown.txt
XXXXXXX XXXXX                 MM11111    ZM    0000       000000000000000000000OREGON XXXXXXX HXN  001111  01010

If the range is 181 to 184, blue 184-181, red 181-1

You can let the calculation be done by the program if the range is supplied in the form of (x,y), for example.

Code:
$ perl -pe 'BEGIN{@p=(48,51); $len=$p[1]-$p[0]; --$p[0]} $sub = substr $_, $p[0], $len and $padd = sprintf "%04d", $sub and s/$sub/$padd/' showdown.txt
XXXXXXX XXXXX                 MM11111    ZM    0000       000000000000000000000OREGON XXXXXXX HXN  001111  01010

This User Gave Thanks to Aia For This Post:
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LEARN ABOUT CENTOS

grub-render-label

GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME

       grub-render-label - generate a .disk_label for Apple Macs.

SYNOPSIS

       grub-render-label [OPTION...] [OPTIONS]

DESCRIPTION

       Render Apple .disk_label.

       -b, --bgcolor=COLOR
              use COLOR for background

       -c, --color=COLOR
              use COLOR for text

       -f, --font=FILE
              use FILE as font (PF2).

       -i, --input=FILE
              read text from FILE.

       -o, --output=FILE
              set output filename. Default is STDOUT

       -t, --text=STRING
              set the label to render

       -v, --verbose
              print verbose messages.

       -?, --help
              give this help list

       --usage
              give a short usage message

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       The  full  documentation  for grub-render-label is maintained as a Texinfo manual.  If the info and grub-render-label programs are properly
       installed at your site, the command

              info grub-render-label

       should give you access to the complete manual.

grub-render-label (GRUB) 2.02-2ubuntu8.3                             July 2018                                                GRUB-RENDER-LABEL(1)
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