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jQuery.extend扩展函数简单用法

静态扩展
$.extend({
test:function(){alert(‘this test!’)}
})

使用$.test()

重载合并
var people1 = {
apple: 0,
banana: { weight: 52, price: 100 }
};
var people2 = {
banana: { price: 200 },
age: 100
};

//将people2中的内容追加，覆盖到people1，破坏people1原有结构
$.extend(people1,people2);
//people1的内容变为：{apple:0,banana{price:200},age:100}

//下面方式是合并到新的变量，从而不破坏people1
var newPeople=$.extend({},people1,people2);
//people1的内容变为：{apple:0,banana{price:200},age:100}

//深度合并
$.extend(true,people1,people2);
//people1的内容变为：{apple:0,banana{weight: 52,price:200},age:100}