text: //元祖
  var nameUser = ['hello', 1];
  console.log(nameUser[0].substr(1));
  var user = "user";
  user = 'bang';
  var a = [1, 2, 3];
  console.log(a[0]);
  var Color;
  (function (Color) {
      Color[Color["Red"] = 1] = "Red";
      Color[Color["Green"] = 2] = "Green";
      Color[Color["Blue"] = 4] = "Blue";
  })(Color || (Color = {}));
  var c = Color.Blue;
  console.log(c);
  //any 表示任何都可以 就是js
  var source = 2;
  source = [1, 2, 3];
  console.log(source[2]);
  function warnUser() {
      console.log('rentrun void');
  }
  warnUser();
  // | 表示联合类型
  var u = undefined;
  u = 1;
  //object 是对象
  var userNameM = {
      name: 'a',
      age: 1
  };
  var someValue = " sss";
  console.log(someValue.length);
  var x = ['aa', 1];
  x[3] = '1';
  