Re: Append newline to many files

[zzapper <zsh@xxxxxxxxxxxxxx>]

On 25/09/2022 14:30, Roman Perepelitsa wrote:
> On Sun, Sep 25, 2022 at 3:21 PM Dominik Vogt <dominik.vogt@xxxxxx> wrote:
> > Assume there are thousands of text files that are not terminated
> > with a newline.  I want to concatenate them all, but add the
> > missing newline between files.
> >
> > This works but takes ten times as much time as "cat foo.*".
> >
> >    for i in foo.*; do cat "$i"; echo; done > out
> >
> > I can't really think of a fast yet simple solution.
> This should work:
>
>      print >lf
>      files=(foo.*)
>      lf=(lf)
>      cat -- ${files:^^lf}
>      rm lf
>
> Roman.
This looks interesting but any chance of an explanation of how it works 
for us lesser mortals please?

zzapper