var nyc = { fullName: "New York City", mayor: "Bill de Blasio", population: 8000000, boroughs: 5}; for(var property in nyc) { console.log(nyc.property); }//控制臺 不應該是屬性的值么？undefinedundefinedundefinedundefined
為什么for in循環里訪問對象的屬性是undifined？
冉冉說
2018-12-13 19:15:07