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How to assign value to variable using cut?

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Top Forums Shell Programming and Scripting How to assign value to variable using cut?
# 8  
Old 11-13-2014
Quote:
I was just trying to retrieve a string from a line number and then use cut to get a specific set of characters from it. I was able to do that successfully using

Code:
sed -n 73p  style.css | cut -c  30-35 |

I am now trying to take the argument replace it in a file and redirect the output back to that same file... Everything is working but I can't seem to find a way to redirect it back to the same file

sed -n 73p style.css | cut -c 30-35 | xargs -I :hex: sed 's/!BGCOLOR!/:hex:/' client_custom.css
1) Stop cramming xargs everywhere. You don't know what it does.
2) This is the first time you mentioned putting it back into the file. That would have been nice to know, since editing files doesn't work that way either.

Quote:
Originally Posted by eldan88
Hey Corona688. Sorry about doubling up the last post. I don't understand what you mean by "Show the input you have, and show the output you want"
It's not a trick question. If you asked:

Quote:
I have a file that looks like this:

Code:
A A A A B C D
E E F G H I J K
L M N
O P Q R S T
U

V
WXYZ0123456789

...and I want to replace the contents in red with QQ ZZ RR TT. How do I do that?
...then I might have some idea what you are trying to do.
# 9  
Old 11-13-2014
Orginally i wanted to assign it to a variable and then use that variable to do a find a replace on a file. Then I thought why not just do that on one command. Your example with replacing those letters is not a good example of what i am trying to achieve.

What i am trying to achieve is to take a hexidecimal code from style.css. Take that value and replace it with !BG-COLOR! In my custom-style.css.

If xargs wont do the job can you please help me out with what command i should be using. Thanks
# 10  
Old 11-14-2014
Could you copy and paste here line 73 of style.css?

Could you copy and paste here 10 lines of the area where you want to replace in client_custom.css with !BG-COLOR!?
# 11  
Old 11-14-2014
How about (untested, as sample files are missing):
Code:
awk 'NR==73 {HEX=substr($0, 30, 6)} {sub (/!BGCOLOR!/, HEX)}' style.css custom-style.css

redirect its output to a temp file, and finally mv that back to custom-style.css
# 12  
Old 11-14-2014
Quote:
Originally Posted by eldan88
If xargs wont do the job can you please help me out with what command i should be using. Thanks
That depends on what you want! I could give you a million different answers -- none of which would work -- because you have not given us enough information.

Show the input you have. Show the output you want. You're wasting everyone's time, especially your own, if you don't. Last try before I lock your thread.
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