I was attempting:
```
__ipairs = function(t, i)
i = i or -1
return function(t, i)
i = i + 1
local v = hidden_table[i]
if v then
return i, v
end
end, t, i
end
```
However, I was surprised to see that `__ipairs` adjusts the argument list to 1. I refactored to make this work with a plain old for loop and it's not a huge deal, but it was not "least surprising."
I would think that the number of arguments passed into `ipairs` is none of Lua's business... por que?
--Andrew
