js数组条件筛选——map()

在对象数组中检索属性为指定值得某个对象使用map()就非常方便。

对象数组

var studentArray = [
    {"name":"小明","gender":"男","subject":['语文','数学'],"score":85},
    {"name":"小刚","gender":"男","subject":['英语','数学'],"score":90},
    {"name":"小红","gender":"女","subject":['语文','英语'],"score":72},
    {"name":"小方","gender":"女","subject":['语文','历史'],"score":63},
    {"name":"小王","gender":"男","subject":['物理','化学'],"score":89}
];

检索name为“小刚”的学生

var MyIndex = studentArray.map((item) => item.name).indexOf("小刚");

通过map()将原对象数组以name属性为元素重组为一个新的数组。