Interview Question for JS fundamentals

myBind.js

function myBind() {
  var args = Array.slice(arguments);
  var func = arguments.pop()
  var that = arguments.pop()

  return ;
}

// currying
var add = function(...) { return x + y; }

var add3 = myBind(add, null, 3);

add3(4) === 7;

// curry 'this'

addThis = function(x) { return x + this.x; }

var add3This = myBind(addThis, {x: 3})

add3This(4) === 7

Potentially ask them to implement add with an arbitrary number of arguments

potentially ask them to implement a test plan