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Date: | Tue, 18 May 2010 00:24:14 -0400 |
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On May 17, 2010, at 10:02 PM, jeff donovan wrote:
> Greetings
>
> this is driving me nutz.
>
> using 10.6, from the terminal
>
> sed ' s/([\t]+)/[:]/g' tabfile > notabfile
>
> trying to search and replace tabs from a file in bash. I can do it
> in perl, perl -pi -e 's/\t/:/g' filename but not with sed. Ive tried
> it from a simple cat tabfile | sed 's/\t/,/g'
>
> any assistance would be helpful.
> -j
I think for sed, it has to be an actual tab character and not the
escape "\t" .
Unfortunately, with tab completions in bash turned on, you have to
either
type: Control-V tab to insert a literal tab, or use some other trick.
This works ( using control-V tab ):
$ sed -E "s/ +/:/g"
1 2 3
1:2:3
Another way to get the tab character:
$ T=$(echo "." | tr '.' '\t' )
$ sed -E "s/${T}+/:/g"
1 2 3
1:2:3
But, as long as we're bringing up 'tr' : 'tr' has a '-s' option to
reduce multiple chars
to a single one, so:
$ tr -s '\t' ':'
1 2 3
1:2:3
will do the same thing with less fuss.
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