Re: Accessing String contents

[Coda Highland <chighland@...>]

On Wed, Jun 20, 2012 at 10:36 PM,  <meino.cramer@gmx.de> wrote:
> Hi,
>
> from a string in a table like this
>
>    a={}
>    a[1]="hello"
>
> I want to access/retrieve the n-th character.
>
> Somewhere I read about, that in lua everything is a table,
> therefore I thought that
>
>    =a[1][1]
>
> would gives me "h" instead of an error.
>
> But this may be thought too C-ish... ;)
>
> I scanned through the String Tutorial, the String Library Tutotrial
> and the online version of Programming Lua and found nothing what seems
> appropiate to me...but I am sure that's due to me.... :)
>
> What is the most cheapest (in terms of performance and programming
> overhead) way to access the n-th character of a string which stored
> at a certain index in a table?
>
> Thank you very much in advance for any help!
> Best regards,
> mcc

Strings are tables, but the characters aren't table elements. Lua
doesn't offer that sugar. Instead, consult string.sub(). You'll
probably use it like this:

a[1]:sub(1,1)

/s/ Adam