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Re: howto join lines



On Wed, 2008-10-01 at 20:09 -0430, Patrick O'Callaghan wrote:
> On Wed, 2008-10-01 at 20:04 -0400, Chris Tyler wrote:
> > On Thu, 2008-10-02 at 09:37 +1000, Norman Gaywood wrote:
> > > On Wed, Oct 01, 2008 at 03:55:08PM -0400, Chris Tyler wrote:
> > > > On Wed, 2008-10-01 at 14:40 -0500, Les Mikesell wrote:
> > > > > Patrick O'Callaghan wrote:
> > > > > >
> > > > > >>>> i want to have those lines joined to one line with
> > > > > >>> spaces
> > > > > >>>> Before :
> > > > > >>>>
> > > > > >>>> textone
> > > > > >>>> texttwo
> > > > > >>>> something
> > > > > >>>>
> > > > > >>>> After :
> > > > > >>>>
> > > > > >>>> textone texttwo something
> > > > > >>>>
> > > > > 
> > > > > echo `cat multi_line_file`
> > > > > or
> > > > > echo $(cat multi_line_file`)
> > > > 
> > > > Or to avoid the fork & exec:
> > > > 
> > > >     echo $(<multi_line_file)
> > > 
> > > But you will end up with problems with the number of arguments on a
> > > command line if multi_line_file is too large.
> > > 
> > > How about:
> > > 
> > > cat multi_line_file | xargs
> > > 
> > > Note that the default command for xargs is echo
> > > 
> > > Or, to avoid a "useless use of cat" award (see
> > > http://partmaps.org/era/unix/award.html):
> > > 
> > > xargs < multi_line_file
> > 
> > Alas, that doesn't solve the problem with the excessive number/length of
> > arguments either, because xargs will execute the echo multiple times if
> > necessary to keep within the arg limits, potentially generating newlines
> > in the output.
> > 
> > ...Which is why I like the translate I proposed earlier:
> > 
> >    tr "\012" " " <multi_line_file
> 
> tr -d "\012" < multi_line_file
> 
> is slightly more elegant. Of course this assumes the file is ASCII or
> similar.
> 
> poc

But the OP said:

> i want to have those lines joined to one line with spaces

-Chris


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