Question

我试图过滤不正确答案的答案数组，然后只从原始数组中删除其中的两个。

代码：

var answers = [
   {text: "foo",  isCorrect: false},
   {text: "bar",  isCorrect: true},
   {text: "foo2", isCorrect: false},
   {text: "bar2", isCorrect: false}
]
var inCorrect = answers.filter((v, i) => !v.isCorrect);

从inCorrect数组中选择两个随机答案，并从答案数组中获取索引。

Answer 1

是否只需回拨answers工作？

＆＃13;

var answers = [
   {val : "foo",  isCorrect: false},
   {val : "bar",  isCorrect: true},
   {val : "foo2", isCorrect: false},
   {val : "bar2", isCorrect: false}
];
answers = answers.filter(v => v.isCorrect);

console.log(answers);

＆＃13;

Answer 2

要选择正确答案以及两个随机错误答案，您可以使用以下代码。这将使原始数组保持原样，并返回对原始数组中对象的引用。

＆＃13;

    <Router history={history}>
        <Switch>
            <Route exact path="/" component={App}>
                <Route path="/cards" component={Example} />
            </Route>
        </Switch>
    </Router>

＆＃13;

过滤数组并保持对原始数组的索引的引用？

2 个答案: