苏沐

摘要： //第一种声明 var arr1 = [1, 2, 3] console.log(arr1) //第二种声明 var arr2 = new Array(10) //length为10 console.log(arr2.length); //遍历 var arr1 = [1, 2, 3] //普通遍历 阅读全文