Using "this" as an Argument of Callback method[javaScript]

function destroyer(arr) {
  // Remove all the values
  var arg = Array.from(arguments);
  var initial=arg[0];
  var destr=[];
  for(i=1;i<arg.length;i++)
    destr[i-1]=arg[i];
  for(i=0;i<destr.length;i++)
  initial=initial.filter(tester,destr[i]);
  return initial;
}
function tester(value){
  if(value==this)
    return false;
  else
  return true;
}

destroyer([1, 2, 3, 1, 2, 3], 2, 3);
//OUTPUT : [1,1]

Explanation :

• .filter() will remove the present element if callback function returns false.
• 'arguments' is a language defined object which has the arguments passed into the function,but this will not be in array format.
• Array.from(arguments) returns the arguments in array format.
• Second argument passed to the .filter() method is visible to callback function (in this case "tester") via "this" object inside the callback function.