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Re: mutate list by appending a list (and similar for props)


From: Sam Halliday
Subject: Re: mutate list by appending a list (and similar for props)
Date: Thu, 18 Sep 2014 02:42:03 -0700 (PDT)
User-agent: G2/1.0

On Thursday, 18 September 2014 10:37:52 UTC+1, Sam Halliday  wrote:
> On Monday, 8 September 2014 20:29:17 UTC+1, Barry Margolin  wrote:
> 
> >  Sam Halliday <address@hidden> wrote:
> 
> > > I often find that I am repeating calls to add-to-list (mutates) / 
> > > plist-put 
> 
> > > (immutable) in my .emacs [1] configuration against the same variable. I'd 
> 
> > > like to be able to pass a list of elements to be appended/prepended to 
> > > the 
> 
> > > variable to save on boilerplate.
> 
> > 
> 
> > > It would be trivial to write a little function that repeats the operation 
> > > for 
> 
> > > a list input, but I'd rather use something that is already in the emacs 
> 
> > > distro (or at least in a very lightweight MELPA package).
> 
> > 
> 
> > > Does such a thing exist?
> 
> > 
> 
> > 
> 
> > 
> 
> > The append function does it:
> 
> > 
> 
> > (setq list (append additional-list list))
> 
> 
> 
> 
> 
> Thanks! But that's not ideal because it involves repeating the list symbol 
> (which can often be quite long).

(It also doesn't work when the original list is nil)


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