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Re: Invoking a function from a list of functions

From: Tim Johnson
Subject: Re: Invoking a function from a list of functions
Date: Thu, 8 Nov 2018 21:03:02 -0900
User-agent: Mutt/1.10.0 (2018-05-17)

* Eric Abrahamsen <> [181108 16:28]:
> Tim Johnson <> writes:
> > Given a list of functions:
> > (setq funcs '(scroll-up-line scroll-down-line))
> >
> > And assuming that these functions have a similar argument list, 
> > I can invoke a function as:
> >
> > (funcall (nth 1 funcs))
> > ;; or optionally 
> > (funcall (nth 1 funcs) 2)
> >
> > That approach is sufficient for my needs at the moment, an example
> > of which might be to cycle through color themes invoked by my own
> > functions.
> >
> > However, in the quest for futher edification I'd welcome URLs to
> > documentation or discussion, as well as any contributions other
> > emacsen might choose to make. Keywords also.
> >
> > I had a heck of a time getting relevant responses from google. I
> > actually don't know what keywords to search with. 
> It isn't clear to me, at least, what else you might be trying to achieve
> here. Is it more accurately selecting a function from within a list,
> using a keyword? Or cycling through functions in a list?
> You'll have a heck of a time getting relevant responses on this list,
> too, unless you tell us what you're after! :)
  Thanks for the reply Eric: As I demonstrated on my code examples,
  I know how to extract a function from a list and invoke it.

  ... So that's done. Now, iterating thru a list of functions that
  might invoke a particular color theme is an example of such an
  application and I think I grok that.

  What I am interested in is further discussion whether it be from
  replies to this topic or more general topics in this area. I'm
  restating that I've had a difficult time finding results from

    That is probably because I don't know the right keywords
    or domain-specific terms to use

  This isn't just difficult for emacs/elisp, I've found it difficult
  for python functions invoked from lists or dictionaries. (altho
  I've employed such methods for years in python)

  So I'm sorry to be so unclear: let me restate the nut and kernel
  of my question: 

  If I wished to further research this topic using a search engine
  what are the keywords that I might feed to google?

  I hope that you now understand what I'm after.

Tim Johnson

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