js提取对象数组中的某一个属性

arrOld = [
　　{name: "zhangsan", age: "18"},
　　{name: "lisi", age: "20"},
　　{name: "wangwu", age: "17"},
　　{name: "zhaoliu", age: "19"}
]

arrOld.forEach(item => {
                    console.log(item.name);
                    console.log(item.age);
               })