Re: concat with separators ?

[Tino Calancha]

On Sun, 28 May 2017, Jean-Christophe Helary wrote:

> > On May 24, 2017, at 23:34, Clément Pit-Claudel <address@hidden> wrote:
> >
> > > I just realized today that concat did not come with optional separators (unlike 
> > > mapconcat). Is there a reason for that ?
> > >
> > > > I just using mapconcat when I feel that need:
> > > >
> > > > Example:
> > > >
> > > > (mapconcat #'identity '("a" "b" "c") "|")  => "a|b|c"
> > >
> > > That's roughly the definition of string-join in subr-x:
> > >
> > > (defsubst string-join (strings &optional separator)
> > >  "Join all STRINGS using SEPARATOR."
> > >  (mapconcat 'identity strings separator))
>
> Would it be acceptable to provide separators to concat or is it preferable to 
> use string-join instead?
The latter.
Func. `concat' accepts and arbitrary number of sequences (not a list of
sequences as `string-join').