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Full Discussion: Help with sed substitution
Top Forums UNIX for Dummies Questions & Answers Help with sed substitution Post 302379756 by Scrutinizer on Saturday 12th of December 2009 02:42:28 AM
Old 12-12-2009
OK, but that is both hypothetical since the OP did not specify this, and not very typical anyway to have two fields with the same description.

And even if it were the case the sed solution would make this quite controllable.
Code:
$ line='Boston|tcolor=green|desc=Large city in New England|url=www.boston.com|tcolor=green'

$ echo "$line"| sed 's/\(tcolor=\)[^|]*/\1blue/'
Boston|tcolor=blue|desc=Large city in New England|url=www.boston.com|tcolor=green

$ echo "$line"| sed 's/\(tcolor=\)[^|]*/\1blue/2'
Boston|tcolor=green|desc=Large city in New England|url=www.boston.com|tcolor=blue

$ echo "$line"| sed 's/\(tcolor=\)[^|]*/\1blue/g'
Boston|tcolor=blue|desc=Large city in New England|url=www.boston.com|tcolor=blue


Last edited by Scrutinizer; 12-12-2009 at 03:54 AM..
 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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