JS - Object loop

const toDos = {
  x: ["a", "b"],
  z: ["n", "t"]
}
Object.keys(toDos) // ['x', 'z']
Object.values(toDos) // [Array(2), Array(2)]

Object.keys(toDos).map(boardId => toDos[boardId])
// [Array(2), Array(2)]