JS练习题

1：匹配字符串跟数组中存在相同值，并取出数组中的对应元素

var strA = "1,2,3,4,5";
var strB = [{
    "id":"2",
    "name":"小王"
},{
    "id":"5",
    "name":"小李"
},{
    "id":"8",
    "name":"小孙"
},{
    "id":"11",
    "name":"小赵"
},{
    "id":"22",
    "name":"小钱"
},
]

var obj={};
for(var i in strB){
    obj[strB[i].id] = strB[i];
}

var strArr = strA.split(",");
console.log(strArr instanceof Array);

var newArr = [];
for(var item in strArr){
    if(obj[item]){
        newArr.push(obj[item])
    }
}