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Top Forums Shell Programming and Scripting remove blank lines and merge lines in shell Post 302502625 by dvah on Tuesday 8th of March 2011 01:06:10 PM
Old 03-08-2011
Quote:
Originally Posted by yinyuemi
Code:
awk '{printf NF?$0:"\n"}'

This really works good, but i cudnt exactly understand the logic behind it. I'm aware NF is for no. of fields in each line and \n is for newline.

But i cudnt understand the whole logic, if u cud explain me, that be really helpful for me to make changes to this in future.

Grateful to your comments.

Many Thanks!

---------- Post updated at 11:36 PM ---------- Previous update was at 11:31 PM ----------

Thanks for all ur comments. It works weel and good.

I just need another help here.

I need to add a extra delimiter at end of each line. I'll go with the same ex that i posted above.

-in format
xx,xx,xx ,xx , , , , ,,xx,xxxx,
xxxx,, ,, xxx,,

yyy,yy,yy, , , ,yyy,yy,,
yyy,yy,,,yyyyy,

....
 

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WMANAGER(1)						    BSD General Commands Manual 					       WMANAGER(1)

NAME
wmanager -- choose a window manager and launch it SYNOPSIS
wmanager [OPTIONS ...] DESCRIPTION
The wmanager program displays a choice of the window managers listed in the ~/.wmanagerrc file. When one is picked, the related command is written to standard output, intended to be used by shell scripts. If the program is exited without choosing a window manager, ``-1'' is written to standard output. -fg COLOR Set the foreground color. -bg COLOR Set the background color. -bg2 COLOR Set the widget background color -di[splay] host:n.n Set the X display. -dn[d], -nod[nd] Enable/disable drag & drop, probably does nothing. -g[eometry] WxH+X+Y Set the window size and location. -i[conic] Start as iconified. -k[bd], -nok[bd] Enable/disable keyboard support. -na[me] CLASSNAME Set the X window class. -s[cheme] SCHEME Unknown, probably does nothing useful. -ti[tle] WINDOWTITLE Set the window title. -to[oltips], -not[ooltips] Enable/disable tooltips, probably does nothing. EXAMPLE
To start using wmanager, create a ~/.wmanagerrc file - generally with wmanagerrc-update(1) - and add something like the following at the end of your ~/.xsession file: WM="$(wmanager -geometry +570+585)" ... exec $WM See also wmanager-loop(1) for a nicer way to start wmanager. SEE ALSO
wmanager(1), wmanager-loop(1), wmanagerrc-update(1), X(7x) HISTORY
The wmanager program was written by Meik Tessmer in 1999. This manual page was originally written in perldoc format by Tommi Virtanen in 2000, and converted to mdoc format by Peter Pentchev in 2008. AUTHORS
The wmanager program - Meik Tessmer <fuller@daemogorgon.net>. The manual page - Tommi Virtanen <tv@debian.org> and Peter Pentchev <roam@ringlet.net>. BSD
May 22, 2008 BSD
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