后端传递一串数据，返回对应内容

 var arr1 = [{value:222,key:"生活"},{value:333,key:"指导"},{value:444,key:"开始"},{value:555,key:"裂了"}]//需要返回的对应内容
 console.log(arr1.length);
    var arr2 =[]
    for(let i=0;i<=arr1.length-1;i++){//循环对应的长度次数
        console.log(arr[i]);
        if(arr[i] == arr1[i].value){arr2.push(arr1[i].key)} //如果传递的数据中存在对象value中，则吧对象数据中的key内容放进去
    }
    console.log(arr2);