Doubt about For Loop

[Yan18]

I have a doubt with _(underscore) in the Lua for loop. Follow an example below:

function onUse(cid)
    for _, pos in pairs(tile_pos) do
        pos.stackpos = 255
        players = getThingfromPos(pos)
        
    if isPlayer(players.uid) then
            doTeleportThing(players.uid, to_pos, false)
        end
    end
    return true
end

What do _(underscore) in a for loop?

 

[StreamSide]

As you can check here: Loops (https://stigmax.gitbook.io/lua-guide/fundamentals-1/loops)
Lua arrays are key indexed so while you using for it will save two variables
one with the key position and the second with the actual key value, so using underscore in any of those two params its just because you are not going to use it, you can always save that var even if you are not using it.

 

[Ochman]

As @StreamSide; mentioned, _ is a key in your loop.
To elaborate more, in Pythonic languages it has few purposes, but in Lua directly, it is throwaway variable, something like "I don't care it's value".

 

[Yan18]

As you can check here: Loops (https://stigmax.gitbook.io/lua-guide/fundamentals-1/loops)
Lua arrays are key indexed so while you using for it will save two variables
one with the key position and the second with the actual key value, so using underscore in any of those two params its just because you are not going to use it, you can always save that var even if you are not using it.

Thanks bro, I think I understand now haha.

As @StreamSide; mentioned, _ is a key in your loop.
To elaborate more, in Pythonic languages it has few purposes, but in Lua directly, it is throwaway variable, something like "I don't care it's value".

Thanks bro, then would be as I don't import with the index, just the value, alright?