function extend(source, target) {for(var key in source) {var value = source[key];
                    target[key] = value;
                }
            }//            extend(source, target)var a = {
                gender: '男',
                grade: '初三',
                group: '第五组',
                name: '李白'};var b = {};
            extend(a, b);
            b.name = "杜甫";
            console.log(b)var c = {};
            extend(a, c)
            c.name = "苏轼";
            console.log(c)//            
            //es6语法   拷贝继承var q = {name:'李白',age:"18"}var w = {...q}
            console.log(w)var w1 = {...q,age:'20'}
            console.log(w1)" _ue_custom_node_="true">