arradd.nim

proc `&`[N1,N2, T1](arg1: array[N1,T1], arg2: array[N2,T1]): auto =
  const length = (high(arg1) - low(arg1)) + (high(arg2) - low(arg2)) + 2
  var res: array[length, T1]
  var i = 0
  for x in arg1:
    res[i] = x
    i += 1

  for x in arg2:
    res[i] = x
    i += 1

  return res
    
var
  arr1 = [1,2,3,4]
  arr2 = [5,6,7,8]
  

var arr3 = arr1 & arr2
echo repr(arr3)