Question

我知道我已经接近.map了，但是我通过模板文字使用的格式没有通过，所以我认为我使用了错误的方法。我在这里想念什么？谢谢。

我未通过的问题：

"rating should equal [{"title":"Inception","rating":"8.8"},
{"title":"Interstellar","rating":"8.6"},{"title":"The Dark
Knight","rating":"9.0"},{"title":"Batman Begins","rating":"8.3"},
{"title":"Avatar","rating":"7.9"}]"

我的console.log（评分）：

[ '{"title":"Inception","rating":"8.8"}','{"title":"Interstellar","rating":"8.6"}','{"title":"The Dark Knight","rating":"9.0"}','{"title":"Batman Begins","rating":"8.3"}','{"title":"Avatar","rating":"7.9"}' ]

我的尝试

 var rating = [];
watchList.map((val, i, arr) => {
  rating.push(`{"title":"${val.Title}","rating":"${val.imdbRating}"}`);
});

演示测试对象：

{
    "Title": "Avatar",
    "Year": "2009",
    "Rated": "PG-13",
    "Awards": "Won 3 Oscars. Another 80 wins & 121 nominations.",
    "imdbRating": "7.9",
    "Response": "True"
  }

Answer 1

似乎期望有一个 objects 数组：

“评分应等于[{” title“：” Inception“，” rating“：” 8.8“}，...

但是您拥有的是一个 strings 数组：

['{“ title”：“ Inception”，“ rating”：“ 8.8”}'，

请尝试map ping对象数组（并正确使用map，而不要像当前一样使用forEach-map，< em>从地图函数中返回您想要的新数组中的项）：

var rating = watchList.map(val => ({
  title: val.Title,
  rating: val.imdbRating
}));

或者更简洁地讲解参数：

var rating = watchList.map(({ Title: title, imdbRating: rating }) => ({ title, rating }));

使用.map FCC格式化对象查询

1 个答案: