Re: Any pitfalls to the nil index idiom?

[Oliver Kroth <oliver.kroth@...>]

Am 19.07.2016 um 12:14 schrieb Xavier Wang:
> 2016-07-19 14:57 GMT+08:00 Oliver Kroth <oliver.kroth@nec-i.de>:
> > Interesting, but out of curiosity. Wouldn't  debug.setmetatable(nil,{__index
> > = {}}) be faster and arguably simpler? -- Thomas
> > I guess not. Lua would then try to look up the key in the empty {} table,
> > and fail
> But it will return a nil, and index a nil still return a nil, seems no problem.
It returns a nil, but needs to return an empty table that can be 
indexed; nil can't be indexed.
The original problem was to have something like tab.a.b.c.d.e not 
throwing an error, if one of the values
tab.a, tab.a.b, tab.a.b.c, etc is nil.

--
Oliver