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Question for tables and variables :3
Posted: Mon Apr 14, 2014 1:42 pm
by Volgoza
Hello.
Someone help me.
Can i use variable for function table.insert?
Example:
Code: Select all
Table = {}
SomeTable = {}
SomeTable.var = "Table"
function love.mousepressed(x, y, button)
if button == "l" then
table.insert (SomeTable.var, 1)
end
end
That is to substitute the variable as the table name?
Sorry for my english
And ty for answer.
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 1:45 pm
by Snuux
In your example, SomeTable.var has String type.
table.insert (SomeTable.var, 1) - first parameter must be Table - not String...
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 2:26 pm
by Robin
You need to change one line:
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 2:34 pm
by Volgoza
Then it will be and if the variable assignment table does not exist, then do not get anything. I already tried.
Or I did not understand you.
But i did:
https://love2d.org/imgmirrur/ykNXPAr.jpg
where vv.name its - BigCrystal or SmallCrystal1 or SmallCrystal2.
Understand or no?
If you know, how i can get it easy, i would appreciate
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 3:23 pm
by Robin
Volgoza wrote:If you know, how i can get it easy, i would appreciate
I'm afraid I don't understand what you're saying.
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 3:32 pm
by Ranguna259
What's your native language ?
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 4:13 pm
by Snuux
His native language - is Russian. I told him, that it's code is little strange...
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 6:22 pm
by zorg
i could be wrong, but maybe Volgoza wants this:
Basically, if you do the dot syntax like you did before, it will interpret that as the string "var", or more visually, as:
Code: Select all
someTable['var'] -- is the same as: someTable.var
Note that this is how it works everywhere, not just with table.insert.
Edit: I still think my version is what he wants, though he needs to do
instead, without the quotes around Table.
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 7:01 pm
by Ranguna259
OOH now I see what he wants
(maybe)
I think he wants to add something to the "Table" table throught the "SomeTable" table, like so:
Code: Select all
table1 = {}
table2={table1}
table2[1].a = 1
--and so:
table1.a == 1
A pointer of some sort ?
Well I think that that is impossible, correct me if I'm wrong but when you create a table using another table you'll just be creating another table that is completly isolated from any other table. (table,
table, table, table, table,)
Re: Question for tables and variables :3
Posted: Mon Apr 14, 2014 9:55 pm
by moikmellah
Perhaps something like this is what the OP is looking for?
Code: Select all
Table = {}
SomeTable = {}
SomeTable.var = "Table"
function love.mousepressed(x, y, button)
if button == "l" then
local myTable = _G[SomeTable.var]
table.insert (myTable, 1)
end
end
That allows you to reference a variable by name through the global table _G (scope allowing, of course). Whether it's a wise idea is up for debate, but I think that's what the poster is going for.
(source:
PIL 14.1)
