Sed Tricks Post: 302363303

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Top Forums UNIX for Dummies Questions & Answers Sed Tricks Post 302363303 by ghostdog74 on Tuesday 20th of October 2009 02:57:16 AM

10-20-2009

Registered User

you have to play with word boundary. check your sed man/info page for more info. alternatively, the logic to do this is to iterate each old, check for "old" and when found, change it to "new".. so in bash, you can do something like this, assuming your words are in a file

Code:

#!/bin/bash
declare -a arr
while read -a arr 
do
    for ((i=0;i<=${#arr};i++))
    do
       case "${arr[i]}" in
            old) arr[i]="new"
       esac
    done
    echo "${arr[@]}"
done < file

output

Code:

$ more file
old gold fold old
$ ./shell.sh
new gold fold new

ghostdog74

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fold

FOLD(1) 						    BSD General Commands Manual 						   FOLD(1)

NAME

     fold -- fold long lines for finite width output device

SYNOPSIS

     fold [-bs] [-w width] [file ...]

DESCRIPTION

     The fold utility is a filter which folds the contents of the specified files, or the standard input if no files are specified, breaking the
     lines to have a maximum of 80 columns.

     The options are as follows:

     -b      Count width in bytes rather than column positions.

     -s      Fold line after the last blank character within the first width column positions (or bytes).

     -w width
	     Specify a line width to use instead of the default 80 columns.  Width should be a multiple of 8 if tabs are present, or the tabs
	     should be expanded using expand(1) before using fold.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of fold as described in environ(7).

SEE ALSO

     expand(1), fmt(1)

STANDARDS

     The fold utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BUGS

     If underlining is present it may be messed up by folding.

BSD
								  August 2, 2004							       BSD