concat Function

> concat(["a", ""], ["b", "c"])
[
  "a",
  "",
  "b",
  "c",
]
 
# Can do multiple lists of mixed types, arguments can also be empty lists
concat([], [1, "a"], [[3], "c"])
[
  1,
  "a",
  [
    3,
  ],
  "c",
]