Re: [stack] sweetening concatenative syntax

On Mar 6, 2008, at 9:06 PM, John Nowak wrote:

> You must've missed my response to you earlier where I gave this
> translation:
>
>    map = swap
>          []
>          [rot dup 2dip swap map cons]
>        unlist
>
>> map = [] [ bury over i rot map cons ] unlist
>
> Small point: You forgot the initial swap to put the list on top of the
> stack. The type system would've saved you of course.

Oh crap. We're both wrong. In particular, if the list is null, neither  
of us remembered to pop the function. I also put in a swap for no  
reason. We both forgot to place a null back on top in the empty case  
too. Oi!

This should work:

    map = swap                    ; put the list on top
          [pop null]              ; remove 'f', restore the null
          [rot dup 2dip map cons] ; i swear this works now
        unlist

Perhaps this series of errors is just another argument for lambda  
expressions and types. :) Considering the multitude of errors, I'd say  
it's a pretty strong one...

- John