Re: Defining functions on the fly

["Andreas Röhler" <andreas.roehler@easy-emacs.de>]

Am 16.06.2015 um 01:51 schrieb Gene:
> On Monday, June 15, 2015 at 5:24:40 AM UTC-4, Andreas Röhler wrote:
>> Hi,
>>
>> have a bunch of subroutines which are useful in several modes -
>> beginning/end of expressions, string positions, comments etc.
>>
>> Now every mode should get its own prefix.
>> Can't write
>>
>> (defun (concat "current-prefix-" foo) ())
>>
>> as defun expects a symbol.
>>
>> Exists "fset" - is there a recommended way to go?
> I recommend using lambda to experimentally develop what you think of as a function of the sort defun is typically used typically used to define.
>
> Once the function's actual definition is done via lambda it can be bound to a symbol via fset
>
> (fset (function name-of-function)
>   (lambda (arg)
>    "docstring"
>    ; Body goes here
>   )
> )
>
> Of course the anonymous version of the function can be used via higher order functions such as `apply' and `mapcar' so function development and testing can be furthered before one gets around to deciding to keep it around and name it for convenient future use.
>
> This strategy is pretty much applicable in Scheme as well
>
> (define name-of-function
>   (lambda (arg)
>    ;body
>   )
> )
>
> I hope this helps.
>
> Gene
>

It does, thanks!