jQuery原型属性和原型方法详解

function Person(){};
    var person=new Person();
    alert(person.constructor); //function Person(){}

  function Person(){

    }

    Person.prototype={
      say:function(msg){
        alert(msg); 
      }
    }

    var person=new Person();
    person.say('hello');
    alert(person.constructor); //function Object(){[native code]}

var obj=$('div a');
console.log(obj.selector);//'div a'

console.log($('body').jquery); //1.7.1

console.log ( $('body') .length); //1

  constructor: jQuery,


  // Start with an empty selector
  selector: "",

  // The current version of jQuery being used
  jquery: "1.7.1",

  // The default length of a jQuery object is 0
  length: 0,

// The number of elements contained in the matched element set
  size: function() {
    return this.length;
  },

toArray: function() {
    return slice.call( this, 0 );
  },

alert($('li').toArray());
[
, 
]

// Save a reference to some core methods
87 toString = Object.prototype.toString,
88 hasOwn = Object.prototype.hasOwnProperty,
89 push = Array.prototype.push,
90 slice = Array.prototype.slice,
91 trim = String.prototype.trim,
92 indexOf = Array.prototype.indexOf,

// Get the Nth element in the matched element set OR
// Get the whole matched element set as a clean array
  get: function( num ) {
    return num == null &＃63;

      // Return a 'clean' array
      this.toArray() :

      // Return just the object
      ( num <0 &＃63; this[ this.length + num ] : this[ num ] );
  },