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Full Discussion: SED - adding blank line after each Range Match
Top Forums Shell Programming and Scripting SED - adding blank line after each Range Match Post 302324232 by danmauer on Wednesday 10th of June 2009 09:31:57 AM
Old 06-10-2009
Quote:
sed -n '/select/I,/;/{/;/G;p}
' infile
Awsome!...... in my quest to understand the hows and whys of SED, ( so as not to just be a coding monkey Smilie) could you explaing the part in red

sed -n '/select/I,/;/{/;/G;p}

i beleive the p is to output the results and /;/G to add a blank line..
but I don't understand the purpose/usage of the construct { .... } and the ; between G & p

Can you help me understand so i can use this in the future?


PS: could you recommend a usefull sed book?

Thanks in advance for you help
 

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LEARN ABOUT DEBIAN

mencal

mencal(1)								 1								 mencal(1)

NAME

       mencal - menstruation calendar

SYNOPSIS

       mencal [options] [file1 file2 ... -c CONF1 -c CONF2 ...]

DESCRIPTION

   Display options:
       -m, --monday
	      draw monday as first weekday (sunday is default)

       -1     current month (default)

       -3     previous, current and next month

       -y [YYYY]
	      all-year calendar (default YYYY is current year)

       -q, --quiet
	      no top information will be printed

       -n, --nocolor
	      noncolored output

       -i, --icolor COLOR
	      intersection color (default red)

	      available colors: red, green, blue, yellow, violet, cyan, shiny, bold

   mencal configuration:
       -c, --config
	      s=[YYYY]MMDD,l=LL,d=DD,n=NAME,f=FILE,c=COLOR

	      The  second argument is a comma separated list of options. No spaces are allowed in this list. If no name is specified, 'Unknown' is
	      used.  Various -c options or filenames can be set.

       s,start=[YYYY]MMDD
	      start day of period (default current day)

       l,length=LL
	      length of period in days (default 28)

       d,duration=D
	      duration of menstruation in days (default 4)

       n,name=NAME
	      name of subject

       f,file=FILE
	      filename to save configuration to (see section FILES)

	      only menstruation related variables will be saved

       c,color=COLOR
	      color used for menstruation days

	      available colors: red, green, blue, yellow, violet, cyan, shiny, bold default color is red, with	'-n'  switch  color  settings  are
	      ignored

   Info options:
       -h, --help
	      print help

       -V, --version
	      print version information

FILES
:
       $HOME/.mencalrc - the default configuration file that is automatically loaded

AUTHOR
:
       (C) 2002 C. McCohy
       e-mail: <mccohy@kyberdigi.cz>
       Word-Wide-Web: http://www.kyberdigi.cz/projects/mencal/english

       This  manual  page  was	written for the Debian GNU/Linux distribution because the original program does not have a manual page (but may be
       used by others).

HISTORY

       22 March 2002 - Originally written by Amaya Rodrigo <amaya@debian.org>.
       24 Apr 2002 - New manpage contributed by Pablo S. Torralba <psanchez@skyrealms.org>.
       Amaya Rodrigo <amaya@debian.org> is now responsible for developing and maintaining this manual page. Comments and suggestions  are  greatly
       wellcome.

mencal							       Menstruation calendar							 mencal(1)
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