Re: strings

[Kristofer Karlsson <kristofer.karlsson@...>]

Index lookups on strings will use the default set string metatable, which looks sort of like this: {__index = string}
Obviously string[3] and string[2] are empty by default.

If you want that effect you'll have to write your own string metatable that maps integer keys to sub and the rest to the regular __index lookup.

On Wed, Dec 16, 2009 at 2:29 PM, Hans Hagen <pragma@wxs.nl> wrote:

Hi,

The following is valid lua

a = "text"
b = a[3]
print(a[2])

but b as well as the print are nil. Is there a reason why
this is syntactically correct cq. does not map onto sub somehow?

I could not google info for this effect

Hans


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