RE: something unclear with sed for me
> From: Andras Lorincz [mailto:andras.lorincz@gmail.com]
>
> I want to replaces all multiple spaces with one space. My
> first attempt was this:
>
> sed -e 's/\ */\ /g'
>
> This replaced all multiple spaces with one but as a side
> effect, sed inserted a space between all characters. Playing
> a little I tried
> this:
>
> sed -e 's/[\ ]\ */\ /g'
>
> and this works. The fact is that I don't understand why the
> first one doesn't work. Can someone explain me that?
>
You can use + that means one or more of the preceding character. But + is
defined in extended regular expression. use -r option for the extended
regular expression like this:
sed -r 's/ +/ /g'
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