Actions using symbols

Actions using symbols

[Heime]

I customarily make symbols that I can check on as conditionals

(defun myfunc (actn)
  (when (eq actn 'something) dothis)

Would things go wrong should I start using function names as arguments
For instance, myfunc would use a mapcar implementation when ACTN is
'mapcar and an apply-partially implementation when ACTN is 'apply-partially

(defun myfunc (actn)
  (when (eq actn 'mapcar) dothis)
  (when (eq actn 'apply-partially) dothat)

Re: Actions using symbols

[Manuel Giraud via Users list for the GNU Emacs text editor]

Heime <heimeborgia@protonmail.com> writes:

> I customarily make symbols that I can check on as conditionals
>
> (defun myfunc (actn)
>   (when (eq actn 'something) dothis)
>
> Would things go wrong should I start using function names as arguments

No.

> For instance, myfunc would use a mapcar implementation when ACTN is
> 'mapcar and an apply-partially implementation when ACTN is 'apply-partially
>
> (defun myfunc (actn)
>   (when (eq actn 'mapcar) dothis)
>   (when (eq actn 'apply-partially) dothat)

This is correct code.
-- 
Manuel Giraud

Re: Actions using symbols

[Heime]

Sent with Proton Mail secure email.

On Tuesday, September 3rd, 2024 at 1:38 AM, Manuel Giraud via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:

> Heime heimeborgia@protonmail.com writes:
> 
> > I customarily make symbols that I can check on as conditionals
> > 
> > (defun myfunc (actn)
> > (when (eq actn 'something) dothis)
> > 
> > Would things go wrong should I start using function names as arguments
> 
> 
> No.
> 
> > For instance, myfunc would use a mapcar implementation when ACTN is
> > 'mapcar and an apply-partially implementation when ACTN is 'apply-partially
> > 
> > (defun myfunc (actn)
> > (when (eq actn 'mapcar) dothis)
> > (when (eq actn 'apply-partially) dothat)
> 
> 
> This is correct code.
> --
> Manuel Giraud

What happens when I do (let ((actn 'mapcar)) ? It is actually setting 
actn to the 'mapcar symbol.  When one defines the function mapcar, does
elisp also make the symbol 'mapcar ?

(let ((actn 'mapcar))
  dothat(actn))

Re: Actions using symbols

[alexbuhl]

On Tuesday, September 3rd, 2024 at 5:10 AM, Heime <heimeborgia@protonmail.com> wrote:
 
> Sent with Proton Mail secure email.
> 
> 
> On Tuesday, September 3rd, 2024 at 1:38 AM, Manuel Giraud via Users list for the GNU Emacs text editor help-gnu-emacs@gnu.org wrote:
> 
> > Heime heimeborgia@protonmail.com writes:
> > 
> > > I customarily make symbols that I can check on as conditionals
> > > 
> > > (defun myfunc (actn)
> > > (when (eq actn 'something) dothis)
> > > 
> > > Would things go wrong should I start using function names as arguments
> > 
> > No.
> > 
> > > For instance, myfunc would use a mapcar implementation when ACTN is
> > > 'mapcar and an apply-partially implementation when ACTN is 'apply-partially
> > > 
> > > (defun myfunc (actn)
> > > (when (eq actn 'mapcar) dothis)
> > > (when (eq actn 'apply-partially) dothat)
> > 
> > This is correct code.
> > --
> > Manuel Giraud
> 
> 
> What happens when I do (let ((actn 'mapcar)) ? It is actually setting
> actn to the 'mapcar symbol. When one defines the function mapcar, does
> elisp also make the symbol 'mapcar ?
 
I should have meant this actually 

(let ((actn 'mapcar))
  (dothat actn))