代码如下:
jQuery.fn = jQuery.prototype = {
 constructor: jQuery,
 init: function( selector, context, rootjQuery ) { }, 
 selector: "", 
 jquery: "1.7.2", 
 length: 0, 
 size: function() {},
 toArray: function() {}, 
 get: function( num ) {}, 
 pushStack: function( elems, name, selector ) {}, 
 each: function( callback, args ) {},
 ready: function( fn ) { },
 eq: function( i ) {},
 first: function() {},
 last: function() { },
 slice: function() {},
 map: function( callback ) { },
 end: function() { }, 
 push: push,
 sort: [].sort,
 splice: [].splice
 };
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