for enhui study

dummy_file.js

var x = 1;
console.log("whatever")

easy.js

// The "this" keyword in JavaScript

window.name = "shenmegui";
  var fruits = {
    name: "fruits",
    color: "nocolor",
    eat: function() {
      console.log("eating " + this.name);
    }
  }
  fruits.eat(); // eating fruits;
  var x = fruits.eat;
  x(); // eating shenmegui
  x.bind(fruits)(); // eating fruits;

// call and apply

function addAndSetX(a, b) {
  this.x += a + b;
}

var obj = {x : 1};

addAndSetX.call(obj1, 1, 1); // this = obj1, obj = { x : 3}
addAndSetX.apply(obj1, [1, 2]); // this = obj1, obj = { x : 6}