Type identification and action

Assignment3.js

function typer(val) {
  // Implement me!
  if(typeof(val) === "number" || typeof(val) === "string"){
    return val;
  }
  else if(typeof(val) === "function"  ) 
  {
    return val();
  }
  else if(typeof(val) === "object"){   
    if(val instanceof Object && val instanceof Array ){
       return val[(val.length)-1];
    } 
    else 
    {
     return val.lastName;  
    }
 }
}

typer(10);
// 10

typer("hello");
// hello

typer(function() {
  console.log("going to return 10...");
  return 10;
});
// going to return 10...
// 10

typer([1, 2, 3]);
// 3

typer([1, 2]);
// 2

typer([[1, 2], 2, "asd", 3]);
// 3

typer({ firstName: "Sandeep", lastName: "WTF" });
// WTF

8/10. poor formatting and coding style.