基于具有随机值的属性显示对象

Question

我想根据属性“id”的随机值显示一个对象。随机值必须介于1和数组中的对象数量之间。目前我有这个：

$(document).ready(function () {
var card = [
    {
        name: "string 1"
        , value: "this"
        , other: "that"
        , id: 1
    }
    , {
        name: "string 2"
        , value: "this"
        , other: "that"
        , id: 2
    }
];
    var obj = card.filter(function (obj) {
    var length = card.length();
    var random = Math.floor(Math.random() * length) + 1
    return obj.name === random;
})[0];
console.log(obj);
});