javascript 小嫩嫩自婊記

hash_key_trap.js

var STATE_CASE_1 = 0,
    STATE_CASE_2 = 1,
    STATE_CASE_3 = 2,
    DEFAULT_CASE = 99999;
 
var dict = {
  STATE_CASE_1: function (s) { /**/ }, // The key is not its Number value! It's String "STATE_CASE_1"!
  STATE_CASE_2: function (s) { /**/ },
  STATE_CASE_3: function (s) { /**/ },
  DEFAULT_CASE: function (s) { /**/ }
};
 
dict[STATE_CASE_1] === undefined; 
// Try dict.STATE_CASE_1 or dict["STATE_CASE_1"].

not_your_this.js

var Fruit = function(name) {
  this.fruit = name;
  this.eat = function() { console.log("Eat " + this.fruit); };
};

var banana = new Fruit("BANANA");
banana.eat(); // Eat BANANA

var eatFunction = banana.eat;
eatFunction(); // Eat undefined

eat my banana~