Re: attempt to perform arithmetic on field '_income' (a table value)

[Jayanth Acharya <jayachar88@...>]

On Wed, Sep 18, 2013 at 6:05 PM, Dirk Laurie <dirk.laurie@gmail.com> wrote:

2013/9/18 Chris Berardi <chris.berardi@pmcsystems.com>:

>     Can someone kindly explain the reason why I see this error ?
>         tax.init = function (pIncome, pRate)
>           tax._income = pIncome
>           tax._rate = pRate
>           end
>
>         tax:init(12200, 12)
>
>
>
> The way Lua handles OO, the call to tax:init(12200, 12) is syntactic
> sugar for
> tax.init(tax, 12200, 12). Therefore, tax._income is assigned tax and
> tax._rate
> is assigned what you think is pIncome and what you think is pRate is
> thrown
> away.
>
> Try changing the call to tax.init(12200, 12) or change the function
> definition
> to tax.init = function (self, pIncome, pRate).

And change all the tax.xxx statements to self.xxx statements.

Thanks Dirk, but changing tax to self inside the functions, I get this error:
attempt to index global 'self' (a nil value)