Javier Guerra wrote:
On Tuesday 03 October 2006 9:49 am, David Olofson wrote:
I wasn't really aware of this issue at first (haven't
designed all
that many languages before), and of course, got it wrong
in EEL
(local by default), did some scripting, realized it was
just plain
stupid, switched to explicit declarations for
everything, and never
looked back.
i've read (and agree with) the long and theoretical
explanations about why
local by default is the wrong choice; but could you
share any short anecdote
that convinced you of this?
my point is that a short and simple example might be
more convincing than
the 'real' reasons (and easier to repeat again and again
each time this issue
is mentioned...)
A little searching of the list would avoid rehashing
this every year.
Mike Pall summed things up well in August 2005 [1].
If you read the Python PEP "Statically Nested Scopes"
[2] carefully,
you'll find that lexical scoping in Python does not
allow rebinding of
outer variables, exactly because of variables being
local by default.
[1]
http://lua-users.org/lists/lua-l/2005-08/msg00139.html
[2] http://www.python.org/dev/peps/pep-0227/
