Replacing a character between two numbers

Shell Programming and Scripting
1

Hi, I need to replace a character between two numbers (specifically a - to a _). The problem is that they can be *any* numbers. So, I need a one liner to turn a file like this:

1-2
3-4
55-66
4323-12312893

into the following

1_2
3_4
55_66
4323_12312893

Any help would be appreciated!

2 
sed 's#\([0-9]\+\)\(-\)\([0-9]\+\)#\1_\3#' file
3

Hm, that doesn't seem to be working. I tried using tr with [:digit:] but with no use. Any other ideas? Sorry I am not proficient with sed

---------- Post updated at 10:37 PM ---------- Previous update was at 10:29 PM ----------

sed 's/\([0-9]\)-\([-0-9]\)/\1\_\2/g'

seems to work. thanks for getting me started. from: http://www.windowslinuxosx.com/q/answers-use-sed-command-to-replace-appearing-between-numbers-224042.html

4

I don't know how is your real input, for give input this will work

$ cat <<test | awk 'gsub(/-/,"_")'
1-2
3-4
55-66
4323-12312893
test

1_2
3_4
55_66
4323_12312893

$ awk 'gsub(/-/,"_")' file
5

Note: \+ is GNU sed only.

6

Why not use (ba)sh builtins?
OSX 10.7.5, default bash terminal.

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~> _