On Sat, Jun 15, 2019 at 11:06:52AM +0200, JmageK wrote: > I guess the inefficiency of copying the whole lists can be mitigated partially > by passing a copy of '@ to conc I tested & it works fine across function > calls. But then may as well use cons solution. > > (cons (copy'@) (conc (chop "Si")'(@)))
(copy '@) is a no-op. 'copy' only copies the top level *cells* of a *list*. '@' is a symbol. But with 'cons' it is not needed anyway, as 'cons' makes a new cell. > or > (conc (copy '(@)) (chop "Si")'(@)) Yes, this is fine, but why start the whole machinery of 'copy' in (copy '(@)) when just (cons '@) does the same (i.e. create a single new cell with '@' in its CAR)? Phew, so many ways to get the same thing ;) ☺/ A!ex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
