Re: [Q] newbie questions about timestamp, character code, ..
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- Subject: Re: [Q] newbie questions about timestamp, character code, ..
- From: Gergo Szakal <bastyaelvtars@...>
- Date: Thu, 8 Feb 2007 23:04:18 +0100
On Fri, 9 Feb 2007 06:04:53 +0900
"Makoto Kuwata" <kwa@kuwata-lab.com> wrote:
> Hi,
>
> I have just start learning Lua and I have some questions.
>
> * Is there any way to get timestamp of file?
> I want to get mtime of file to create software build tool
> like 'make' or 'ant'.
You can try luafilesystem.
>
> * How to get character code?
> In C language, 'x' means character code of x, but it means
> string "x" in Lua.
string.byte("x") or ("x"):byte()
>
> * How to check whether table has key or not?
> 'table[key]' cannot check if value of table[key] is nil.
> I can't find 'table.has_key(aTable, key)' in standard library.
>
if table[key] then ... end
means that if the given key in the table is non-nil, then...
--
Gergo Szakal <bastyaelvtars@gmail.com>