Lua : add a table in a table

Question

I recently started learning Lua and I have a question about tables :

local mytable = {10,11,12}

I would add another table in mytable[3] , if I do this :

table.insert(mytable[3], {[15] = {}})

Will it works ?

And if it works, what will be the "final" result ?

mytable[3][15] = {}

or

mytable[3][1][15] = {} 

?

It's probably a basic question but it will help me :p

Answer 1

The first argument of table.insert should be the table being inserted, so the correct syntax is:

table.insert(mytable, {[15] = {}})

After this, the value of mytable[4] (note that Lua table index starts from 1) is the table {[15] = {}}, and the value of mytable[4][15] is therefore an empty table.

---

To make mytable[3] a table {[15] = {}}, use assignment instead:

mytable[3] = {[15] = {}}