今天来学习一下数组的遍历、删除等知识点:
1 数组的遍历
数组元素的遍历可以使用for循环,采用关键字for...in
var aCity = new Array("北京","上海","广州"); //声明一个数组
//遍历数组中的每一项
alert(aCity[i]);
}
二维数组的遍历:
var aCity = new Array();
//二维数组赋值
aCity[0][0] = "常州";
aCity[0][1] = "苏州";
aCity[1] = new Array();
aCity[1][0] = "泰州";
aCity[1][1] = "镇江";
aCity[2] = new Array();
aCity[2][0] = "徐州";
aCity[2][1] = "连云港";
//遍历二维数组
for(var j in aCity[i])
alert(aCity[i][j]);
}
2 删除元素
删除元素可以使用函数pop()和shift(),pop是从数组尾部开始删除、shift是从数组头部开始删除;
var aCity = new Array("东台","南京","上海");
aCity.pop(); //删除“上海”
aCity.shift(); //删除“东台”