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Full Discussion: Help with sed substitution
Top Forums UNIX for Dummies Questions & Answers Help with sed substitution Post 302379758 by ghostdog74 on Saturday 12th of December 2009 03:25:24 AM
Old 12-12-2009
Quote:
Originally Posted by Scrutinizer
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

yes, its hypothetical, but anything is possible. And then comes the part i am asking: non greediness
Code:
$ title="Boston|tcolor=green|desc=Large city in New England|url=www.boston.com|tcolor=green|setcolor=green"
$ echo $title|sed 's/\(tcolor=\)[^|]*/\1blue/g'
Boston|tcolor=blue|desc=Large city in New England|url=www.boston.com|tcolor=blue|setcolor=blue

take care of that, and it should be perfect sed solution

---------- Post updated at 03:25 AM ---------- Previous update was at 03:16 AM ----------
Quote:
Originally Posted by Scrutinizer
I disagree with such a black and white rule. It depends.
you don't have to agree with me. I just don't waste my time crafting complex regex that is hard to read and debug when I can do things more easily.
 

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LEARN ABOUT DEBIAN

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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