TypeScript Function Overload

ts-function-overload.ts

// as per https://www.youtube.com/watch?v=XnyZXNnWAOA

interface Coordinate {
  x: number;
  y: number;
}

function parseCordinates(obj: Coordinate): Coordinate;
function parseCordinates(str: string): Coordinate;
function parseCordinates(num1: number, num2: number): Coordinate;
function parseCordinates(arg1: unknown, arg2?: unknown): Coordinate {
  let coord: Coordinate = {
    x: 0,
    y: 0
  }

  if (typeof arg1 === 'object') {
    coord = {
      ...(arg1 as Coordinate)
    }
  } else if(typeof arg1 === 'string') {
    (arg1 as string).split(',').map(fr => {
      const [key, value] = fr.split(':');
      coord[key] = parseInt(value);
    })
  }  
  else {
    coord = {
      x: (arg1 as number),
      y: (arg2 as number)
    }
  }
  return coord;
}

console.log(parseCordinates({x: 10, y: 20}));
console.log(parseCordinates(10, 78))
console.log(parseCordinates('x:56,y:40'))