Different ways to iterate array n element at a time

local sham_heal = { 586,4,593,4,583,2,587,2,582,0,581,2,588,2,594,4,1648,2,591,0,592,4,590,0,2084,0,2060,1,1697,1,1696,2,2061,2,1698,0,2059,1,2063,4,2064,0,614,4,613,4,607,2 }

```lua
for i = 1, #sham_heal, 2 do
  print(sham_heal[i], sham_heal[i+1])
end
```
```lua
function apply(func, arg_table, num_args)
  local unpack = unpack or table.unpack
  for i = 1, #arg_table, num_args do
    func(unpack(arg_table, i, i+num_args-1))
  end
end

apply(print, sham_heal, 2)
```
```lua
function table_split(table_to_split, elements)
  local unpack = unpack or table.unpack
  local t = {}
  for i = 1, #table_to_split, elements do
    t[#t+1] = {unpack(table_to_split, i, i+elements-1)}
  end
  return t
end

for _, v in ipairs(table_split(sham_heal, 2)) do
     print(v[1], v[2])
end
```
```lua
function iterate_in_chunks(table_to_iterate, elements)
  local unpack = unpack or table.unpack
  local next_index = 1
  local function f()
    local index = next_index
    next_index = next_index+elements
    return unpack(table_to_iterate, index, next_index-1)
  end
  return f
end

for a,b in iterate_in_chunks(sham_heal, 2) do
    print(a,b)
end
```