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Sed: Remove whitespace between two strings

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# 1  
Old 01-26-2011
Sed: Remove whitespace between two strings
I have a 13 number string, some whitespace, and then /mp3.
I need to join them. Everyline that I need this for begins with "cd" (without the quotes).


What it looks like now:
Code:
cd media/Audio/WAVE/9781933976334    /mp3

What I want my output to be:
Code:
cd media/Audio/WAVE/9781933976334/mp3

The 13 number string is always different but always begins with 978.

Please use sed unless there is something much better for this task.
# 2  
Old 01-26-2011
How about this:
Code:
$ echo 'cd media/Audio/WAVE/9781933976334    /mp3' | sed 's=\([0-9][0-9]*\)\( *\)\(/mp3\)=\1\3='
cd media/Audio/WAVE/9781933976334/mp3
$

# 3  
Old 01-26-2011
I ended up using a while loop

Code:
grep -A2 -B2 ^cd '/home/gregg/Desktop/mp3-to-m4b-batch1'|while read line ; do echo ${line}\/mp3;done >>mp3-to-m4b-batch2

---------- Post updated at 10:48 AM ---------- Previous update was at 10:48 AM ----------

Thanks Perderabo, I am going to study your code and learn from it.

---------- Post updated at 11:20 AM ---------- Previous update was at 10:48 AM ----------

Perdabo, can you explain your code please? that is the s=\ ? Is that specifying a delimiter of a backslash?
# 4  
Old 01-26-2011
There is so many solution, here is some if you like to use loops. If input include exactly 3 values then
Code:
cat somefile | while read cmd path mp xxx
do
        echo "$cmd $path$mp"
done > newfile

And if like to use awk, then
Code:
cat somefile | awk '{print $1, $2$3}'  > newfile

# 5  
Old 01-27-2011
another sed solution..
Code:
echo "cd media/Audio/WAVE/9781933976334    /mp3"|sed 's/ \+//2'

# 6  
Old 01-27-2011
And how about:
Code:
echo 'cd media/Audio/WAVE/9781933976334    /mp3' | sed 's! */mp3!/mp3!'

# 7  
Old 01-27-2011
Franklin, please explain your use of !
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