On Thu, Aug 30, 2012 at 12:41 AM, Joop Kiefte <iko...@gmail.com> wrote:
> An empty sequence is equal to nil.
>
What do you mean?
=> (seq? ())
true
=> (= nil ())
false
>
> 2012/8/29 Ambrose Bonnaire-Sergeant <abonnaireserge...@gmail.com>:
> > My guess is that `merge` has an invariant "if all args are nil, return
> nil",
> > making calls to `seq` "contagious" from args to return value.
> >
> > => (merge (seq {}) (seq {}))
> > nil
> >
> > Just a guess though.
> >
> > Thanks,
> > Ambrose
> >
> > On Thu, Aug 30, 2012 at 12:18 AM, Brian Marick <mar...@exampler.com>
> wrote:
> >>
> >> Why does `(merge)` return nil? I would have expected it to return the
> unit
> >> ({}) by analogy with things like this:
> >>
> >> (+) => 0
> >> (*) => 1
> >>
> >> -----
> >> Brian Marick, Artisanal Labrador
> >> Contract programming in Ruby and Clojure
> >> Occasional consulting on Agile
> >>
> >>
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