functional programming with map()

[David Eppstein]

In article <slrn.pl.a7lbtu.3vs69hb.imbaczek at baczek.net.invalid>,
 Marek "Baczek" BaczyŸski <imbaczek at poczta.fm> wrote:

> Pete Shinners wyprodukowa½[ao]?:
> 
> > Donnal Walter wrote:
> >> But what is the functional equvalent of:
> >> 
> >> for x in items:
> >>     x.f()
> > 
> > if all "items" are the same class, you could get away with this,
> > 
> > map(class_of_x.f, items)
> 
> map(type(x).f, items) solves the problem.

x looks like an unbound variable to me.  map(type(items[0]).f, items) is 
close but doesn't work for generators or mixed lists.  If you really insist 
on map, it looks like the right thing is map(lambda x: x.f(), items).
-- 
David Eppstein       UC Irvine Dept. of Information & Computer Science
eppstein at ics.uci.edu http://www.ics.uci.edu/~eppstein/