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Top Forums Shell Programming and Scripting Replacing a character between two numbers Post 302885002 by wisecracker on Thursday 23rd of January 2014 03:14:39 AM
Old 01-23-2014
Why not use (ba)sh builtins?
OSX 10.7.5, default bash terminal.
Code:
Last login: Thu Jan 23 08:04:51 on ttys000
AMIGA:barrywalker~> text="1-2
> 3-4
> 55-66
> 4323-12312893"
AMIGA:barrywalker~> echo "$text"
1-2
3-4
55-66
4323-12312893
AMIGA:barrywalker~> text=$(echo "${text//-/_}")
AMIGA:barrywalker~> echo "$text"
1_2
3_4
55_66
4323_12312893
AMIGA:barrywalker~> _

 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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