interface Coordinate {
  x: number,
  y: number
}

function parseCoordinate(obj: Coordinate): Coordinate
function parseCoordinate(x: number, y: number): Coordinate
function parseCoordinate(arg1: unknown, arg2?: unknown): Coordinate {
  let result: Coordinate = {
    x: 0,
    y: 0
  }

  if(typeof arg1 === 'object') {
    result = {
      ...(arg1 as Coordinate)
    }
  } else {
    result = {
      x: arg1 as number,
      y: arg2 as number
    }
  }

  return result
}

console.log(parseCoordinate({x: 10, y: 15}))
console.log(parseCoordinate(40, 50))