Question

编写一个将季节编号和剧集编号作为输入的功能并提供有关该特定剧集的所有信息作为输出

在将用户的输入作为季节编号和剧集编号后，它不会将输出作为有关该特定剧集的信息

let BigBang =  { 
    "_embedded": {
        "episodes": [
          {
            "id": 2913,
            "name": "Pilot",
            "season": 1,
            "number": 1,
            "airdate": "2007-09-24",
            "airtime": "20:30",
            "airstamp": "2007-09-25T00:30:00+00:00",
            "runtime": 30,


            "_links": {
              "self": {
                "href": "http:\/\/api.tvmaze.com\/episodes\/2913"
              }
            }
          },
          {
            "id": 2914,
            "name": "The Big Bran Hypothesis",
            "season": 1,
            "number": 2,
            "airdate": "2007-10-01",
            "airtime": "20:30",
            "airstamp": "2007-10-02T00:30:00+00:00",
            "runtime": 30,
            "image": {
              "medium": "http:\/\/static.tvmaze.com\/uploads\/images\/medium_landscape\/4\/12369.jpg",
              "original": "http:\/\/static.tvmaze.com\/uploads\/images\/original_untouched\/4\/12369.jpg"
            },
       }



    let season = prompt('Enter Season number');                               
    let number = prompt('Enter Episode number');                            
    let AllInfo = (season,number) => {                                   
        for(let current in BigBang._embedded.episodes) {                    
            if(BigBang._embedded.episodes[current].season === season) {                                              
                if(BigBang._embedded.episodes[current].number === number) { 
                let Detail = BigBang._embedded.episodes[current];
                    alert(Detail);
                }
            }
        }                            
    AllInfo(season,number);                         
    }

Answer 1

尝试使用.find代替它，它会使代码更清晰：

    let BigBang = {
      "_embedded": {
        "episodes": [{
            "id": 2913,
            "name": "Pilot",
            "season": 1,
            "number": 1,
            "airdate": "2007-09-24",
            "airtime": "20:30",
            "airstamp": "2007-09-25T00:30:00+00:00",
            "runtime": 30,
            "_links": {
              "self": {
                "href": "http:\/\/api.tvmaze.com\/episodes\/2913"
              }
            }
          },
          {
            "id": 2914,
            "name": "The Big Bran Hypothesis",
            "season": 1,
            "number": 2,
            "airdate": "2007-10-01",
            "airtime": "20:30",
            "airstamp": "2007-10-02T00:30:00+00:00",
            "runtime": 30,
            "image": {
              "medium": "http:\/\/static.tvmaze.com\/uploads\/images\/medium_landscape\/4\/12369.jpg",
              "original": "http:\/\/static.tvmaze.com\/uploads\/images\/original_untouched\/4\/12369.jpg"
            },
          }
        ]
      }
    }
    //const inputSeason = prompt('Enter Season number');
    const inputSeason = 1;
    //const inputNumber = prompt('Enter Episode number');
    const inputNumber = 2;

    const foundEpisode = BigBang._embedded.episodes.find(({ season, number}) => {
      return season === inputSeason && number === inputNumber;
    });
    if (foundEpisode) console.log(foundEpisode);
    else console.log('No matching season/number found!');

Answer 2

您可以使用阵列上的find（）方法更轻松地完成此任务。

let episode = BigBang._embedded.episodes.find((e) => {
    return e.season === season && e.number === number;
});
if (episode) {
    alert(episode.name);
}

Answer 3

我调试了你的代码，发现你在 AllInfo 中调用了 AllInfo 函数。所以你的代码中会发生递归调用。因此，从AllInfo函数中删除 AllInfo 的调用，您的问题将得到解决。请尝试以下代码。

let BigBang =  { 
"_embedded": {
    "episodes": [
      {
        "id": 2913,
        "name": "Pilot",
        "season": 1,
        "number": 1,
        "airdate": "2007-09-24",
        "airtime": "20:30",
        "airstamp": "2007-09-25T00:30:00+00:00",
        "runtime": 30,


        "_links": {
          "self": {
            "href": "http:\/\/api.tvmaze.com\/episodes\/2913"
          }
        }
      },
      {
        "id": 2914,
        "name": "The Big Bran Hypothesis",
        "season": 1,
        "number": 2,
        "airdate": "2007-10-01",
        "airtime": "20:30",
        "airstamp": "2007-10-02T00:30:00+00:00",
        "runtime": 30,
        "image": {
          "medium": "http:\/\/static.tvmaze.com\/uploads\/images\/medium_landscape\/4\/12369.jpg",
          "original": "http:\/\/static.tvmaze.com\/uploads\/images\/original_untouched\/4\/12369.jpg"
        },
   }]}};



let season = 1;                               
let number = 2;                            
let AllInfo = (season,number) => {                              
    for(let current in BigBang._embedded.episodes) {                    
        if(BigBang._embedded.episodes[current].season === season) {                                              
            if(BigBang._embedded.episodes[current].number === number) { 
            let Detail = BigBang._embedded.episodes[current];
                alert(JSON.stringify(Detail,null,4));
            }
        }
    }                                                     
}
AllInfo(season,number);

迭代javascript对象

3 个答案: