Getting a key as a number

[stout]

Basic lua question:

Code: Select all

var = { {}, {}, {} }

I want some way to get var[1] to return as the number 1, var[2] to return as the number 2, etc. Is there something built-in to do this, or would I need a complicated function?

[grump]

Code: Select all

var = { {}, {}, {} }

I want some way to get var[1] to return as the number 1, var[2] to return as the number 2, etc. Is there something built-in to do this, or would I need a complicated function?

I'm trying to make sense of your question, but I'm not sure I understand what you mean.
The three tables inside var can be accessed as var[1], var[2], and var[3] as is.

Another interpretation of your question:

Code: Select all

var = { 1, 2, 3 }

But these would be values, not keys.

[pgimeno]

I don't understand the question either. Maybe he means something like ipairs()?

Code: Select all

for index, value in ipairs(var) do
  -- index is the number, value is the contents at that index
  print(index .. ": " .. value)
end

[stout]

Sorry, I should've added a use case. I want to do:

Code: Select all

if var[2] > 1 then
~other stuff

Right now, that won't work, because var[2] is a table. I want to eval that "2" there, as a number.

[TheHUG]

Only way would be to make var[2] a number rather than a table (see grump's answer)

[zorg]

Basic lua question:

Code: Select all

var = { {}, {}, {} }

I want some way to get var[1] to return as the number 1, var[2] to return as the number 2, etc. Is there something built-in to do this, or would I need a complicated function?

Simple, don't do that and instead do this:

Code: Select all

var = { 1, 2, 3 }

Debugging shall continue when you tell us why that's not acceptable.

[sphyrth]

Let's expand your code:

Code: Select all

var = {
  {}, -- var[1] A Table
  {}, -- var[2] Another Table
  {}  -- var[3] And yet another Table
}

For now, keep zorg's suggestion:

Code: Select all

var = {
  1, -- var[1] a number
  2, -- var[2] and so on
  3
}

[Nikki]

I am not sure I understand completely,
but do you mean something like this:

Code: Select all

   local var = {10,11,12}

   for k,v in ipairs(var) do
      print(k,v)
   end
   

which will print
1 10
2 11
3 12

that 'k' here is the key (1,2,3) and the 'v' is the value (10,11,12)

[pgimeno]

Sorry, I should've added a use case. I want to do:

Code: Select all

if var[2] > 1 then
~other stuff

Right now, that won't work, because var[2] is a table. I want to eval that "2" there, as a number.

The 2 is a value itself. Taken at face value, the answer to your question is:

Code: Select all

if 2 > 1 then
~other stuff

But I have the hunch that this is not what you want.

Try explaining what are the subtables in the table, and what you're trying to accomplish with them.