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Full Discussion: Replace a multi-line strings or numbers
Top Forums Shell Programming and Scripting Replace a multi-line strings or numbers Post 302810437 by khaled79 on Tuesday 21st of May 2013 09:14:59 PM
Old 05-21-2013
rveri

it wont work !

Code:
 
# v=45654;perl -0777  -pe 's/$ENV{v}\n199\n225/$ENV{v}\n258/igs' file

---------- Post updated at 08:14 PM ---------- Previous update was at 07:45 PM ----------

Quote:
Originally Posted by Yoda
So I assume that you are going to define starting sequence in a variable.

In that case you can pass whatever variable to awk, assign it and use it.

You can code something like:
Code:
SEQ=XXX
 
awk -v S="$SEQ" '
        {
                A[++c] = $1
        }
        END {
                for ( i = 1; i <= c; i++ )
                {
                        if ( A[i] == S && A[i+1] == 199 && A[i+2] == 225 )
                        {
                                A[i+1] = 258
                                A[i+2] = 0
                        }
                        if ( A[i] )
                                print A[i]
                }
        }
' file

I used shell variable: SEQ, replace value XXX with the number of your choice. I hope this helps.

Yoda

for small files awk working with no problem
but, with large files the awk shows this error


Code:
 
awk: cmd. line:3: (FILENAME=a.txt FNR=18498251) fatal: more_nodes: nextfree: can 't allocate 4000 bytes of memory (Cannot allocate memory)

and this error too printed in Cygwin terminal

Code:
 
line 3: 7488 Aborted (core dumped) awk -v S="$SEQ" '
{
A[++c] = $1
}
END {
for ( i = 1; i <= c; i++ )
{
if ( A[i] == S && A[i+1] == 199 && A[i+2] == 225 )
{
A[i+1] = 258
A[i+2] = 0
}
if ( A[i] )
print A[i]
　
}
}
' ascii.txt >pre.txt

any help about it?

Thanks a lot



 

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LEARN ABOUT NETBSD

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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