On Sat, Jun 15, 2019 at 10:03:02AM +0200, JmageK wrote: > >> : (conc (cons '@) (chop S) '(@)) > >> -> (@ "t" "s" "t" @) > > > I mean (conc '(@)(chop S)'(@))
Well, this is not to recommend. 'conc' is a destructive operation, so (conc '(@) ... will concatenate the rest to the cell (@). This works well if called only a single time (e.g. in the REPL), but is not desirable if it is in a function definition. Instead, you could call the non-destructive pendant of 'conc', which is 'append': (append '(@) (chop S) '(@)) but this is less efficient because it copies not only (@) but also the result of the 'chop' (which in turn does not *need* to be copied as it is just freshly created and not shared anywhere. So I would say that (conc (cons '@) (chop S) '(@)) or alternatively (cons '@ (conc (chop S) '(@)) is the best. ☺/ A!ex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
