What are lua metatables?

A quick video explaining what lua metatables are and how they work.

[TechHog]

This video was a while ago, but I have a quick correction. Index and new index only fire if the index doesn't exist in the table already. This doesn't apply to userdatas since they don't have data anyway.

[SurroundSoundscapes]

If i had a table named “names” and it looked like “local names = {"john", "bobby", "billy"}” and i did a for i, v in pairs loop through it, how would i make it so the v value gets set to a string like “sorry, you cant index me!”, I’ve tried this: local names = {“john”, “bobby, ”billy”}

setmetatable(names, {
__index = function(a, b)
return “sorry, you cant index me!”
end
})

for i, v in pairs(names) do
print(i, v)
end

[BennettEU]

good video man helped alot can you make one on hookfunction? i just dont understand it for some reason