How to fuse array in Lua

Question

how can I fuse two array into one to be like:

local array1 = {2272, 2271, 2270, 2269}
local array2 = {2267, 2266, 2268, 2265, 2264, 2263, 2262, 2261}
local fusedArray = {2272, 2271, 2270, 2269, 2267, 2266, 2268, 2265, 2264, 2263, 2262, 2261}

or

local array1 = {2292, 2291, 2290, 2289}
local array2 = {2267, 2266, 2268, 2265, 2264, 2263, 2262, 2261}
local fusedArray = {2292, 2291, 2290, 2289, 2267, 2266, 2268, 2265, 2264, 2263, 2262, 2261}

Answer 1

The standard library can help with this:

local function concatArray(a, b)
  local result = {table.unpack(a)}
  table.move(b, 1, #b, #result + 1, result)
  return result
end

See table.move and table.unpack in the docs.

Answer 2

You'll have to iterate both tables (using ipairs or pairs function) and insert elements into a third table. If you can modify one of them, then only iterate the other table and insert its elements into the first one.