On Sun, Jan 27, 2008, "Martin v. L?wis" wrote:
>
> Students just asked me why len() is not a method, and I didn't know a
> good answer; the same holds for many other builtins. This is a clear
> candidate for a method, IMO.
This is why len() is not a method:
map(len, list_of_strings)
What I don't know is to what extent this argument still holds in the
presence of listcomps and genexps:
[s.len() for s in list_of_strings]
However, you still need ``len`` as a function to pass around as a
callback in other cases where you need a generic function because the
type of your data is not predetermined.
In any event, I consider dropping len() from builtins to be gratuitous
breakage, even in 3.0.
--
Aahz (aahz at pythoncraft.com) <*> http://www.pythoncraft.com/
"All problems in computer science can be solved by another level of
indirection." --Butler Lampson
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