$.extend()

合并多个对象
$.extend(deep,target,object)
deep指示是否深度合并对象，默认为false。如果该值为true，且多个对象的某个同名属性也都是对象，则该"属性对象"的属性也将进行合并。,

    var object1 = {
        apple: 0,
        banana: { weight: 52, price: 100 },
        cherry: 97
    };
    var object2 = {
        banana: { price: 200 },
        durian: 100
    }; 
    // 将 object2 递归合并到 object1中
    $.extend( true, object1, object2 );
    结果：
    object1: {"apple":0,"banana":{"weight":52,"price":200},"cherry":97,"durian":100}
    
    $.extend( false, object1, object2 );
    结果：
    {"apple":0,"banana":{price:200},"cherry":97，,"durian":100}