Re: Iterating over tables
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- Subject: Re: Iterating over tables
- From: Eva Schmidt <es@...>
- Date: 2007年12月19日 17:14:34 +0100
Hi Chris,
I think there are several problems for you to solve:
1.) It doesn't matter if you read in a Lua table in C or in Lua - the most
important thing is that it's really a Lua table. So if you read it in with Lua,
I think it will be a string. You can use the io functions
io.open
io.read
...
for reading in the file. If you've done so, the file content will be in your Lua
script as a string.
2.) The string must be parsed then to create the tables and subtables in Lua.
Once you have tables, you can parse them :-)
My suggestion would be to create a function named test () (according to your
test file). The parameter to this function should be a table:
function test (tbl)
if tbl ~= nil then
print ("Table on board")
r_print(tbl)
return tbl
end
print ("Sad but true ;-(")
end
The function r_print () is just a recursive function for printing subtables:
function r_print (tbl)
for i,v in pairs (tbl) do
print (i,v)
if type(v) == "table" then
r_print (v)
end
end
end
Use the loadstring () function for creating a function from your read in string
and use pcall () for calling the string. It will call your test function, the
table within can be accessed as function parameter :-):
s, error = loadstring ("test {admin = { x = 2, y = 3}}")
pcall (s)
As you can see here, there should be no "=" after test, because it shall be
interpreted as function call. But you can also read in the string and prepend
your functionname :
input = "test = {{admin = { x = 2, y = 3}}}"
input = "myfunction {" .. input .. "}"
Maybe that helps a little bit :-)
Regards,
Eva