Re: strings

[Hans Hagen <pragma@...>]

steve donovan wrote:
> On Wed, Dec 16, 2009 at 3:29 PM, Hans Hagen <pragma@wxs.nl> wrote:
> > The following is valid lua
> >
> > a = "text"
> > b = a[3]
>
> Yes, given that there is no index operator for strings it seems odd
> that we don't get an error. The reason is that strings have a
> metatable with __index pointing to the string table; looking up [3] on
> s leads to string[3] which gives the nil as you've noticed.
>
> If you're prepared to modify the metatable of all strings, then you
> can define a[3] in this case to be a:sub(3,3)

can you give an example? __index gets a (table, n) passed and not the 
string itself

Hans

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