Question

我有一个有效的json文件（我只放入其中的一部分）。我想搜索不区分大小写并查找为包含（假设json文件中有Red Carpet记录，如果用户搜索“ red”，它将显示匹配项的video_url（“ Red Carpet”的video_url）。我有一个限制，我可以做到）由于硬件原因，请使用ES6。请说明如何将以下json文件转换为javascript对象，并使用jquery或javascript进行包含不区分大小写的搜索。为此，我可以在项目中添加lodash或任何其他javascript库。 / p>

[{
        "video_url": "http://63.237.48.3/ipnx/media/movies/Zane_Ziadi_HQ.mp4",
        "title": "Zane Ziadi"
    },
    {
        "video_url": "http://63.237.48.3/ipnx/media/movies/DarBastAzadiHQ.mp4",
        "title": "Darbast Azadi"
    },
    {
        "video_url": "http://63.237.48.3/ipnx/media/movies/Cheghadr_Vaght_Dari_HQ.mp4",
        "title": "Cheghadr Vaght Dari"
    },
    {
        "video_url": "http://63.237.48.3/ipnx/media/movies/Mashaal_HQ.mp4",
        "title": "Mashaal"
    },
    {
        "video_url": "http://63.237.48.3/ipnx/media/movies/Red_Carpet_HQ.mp4",
        "title": "Red Carpet"
    }
]

以下代码无效：

  document.getElementById('input').addEventListener('change', function() {

 var name = document.getElementById('input').value.toLowerCase();
    var result = _.find(movies, {'title': name});
    if (!result){
       console.log('Nothing found');
    }else{
         console.log('Go to ' + result.video_url);

    }
    });

Edit2：update2

通过Akrion评论修复并解决，非常感谢他

Edit3：update3

Akrion答案似乎是，在搜索字符“ a”时，它不会返回以A为字符的所有标题，请修改并更正我尝试运行ES5部分答案的代码，并且仅返回zane ziadi项目，而不是“ Cheghadr Vaght Dari”

Edit4：update4 正如Akrion在他的评论中建议的那样，我可以使用过滤器而不是查找来匹配所有搜索。我将他对这个主题的回答永远标记为

Answer 1

您的代码存在的问题是，您要求lodash比较title的确切内容，并且更重要的是，在区分大小写的情况下进行比较，因为{title: name}会触发lodash中的属性匹配它只是将标题的内容与变量的内容进行比较。

您可以通过lodash方法创建搜索功能，而无需这样的ES6：

const data = [{ "video_url": "http://63.237.48.3/ipnx/media/movies/Zane_Ziadi_HQ.mp4", "title": "Zane Ziadi" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/DarBastAzadiHQ.mp4", "title": "Darbast Azadi" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Cheghadr_Vaght_Dari_HQ.mp4", "title": "Cheghadr Vaght Dari" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Mashaal_HQ.mp4", "title": "Mashaal" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Red_Carpet_HQ.mp4", "title": "Red Carpet" } ]

const search = function(data, term) {
  return _.find(data, function(x) { 
    return _.includes(_.toLower(x.title), _.toLower(term))}) 
  }

console.log(search(data, 'azadi'))
console.log(search(data, 'Red'))
console.log(search(data, 'zan'))

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js"></script>

使用find，includes和toLower lodash方法。

您的代码将如下所示：

function search(data, term) {
  return _.find(data, function(x) { 
    return _.includes(_.toLower(x.title), _.toLower(term))}) 
}

document.getElementById('input').addEventListener('change', function() {
  var name = document.getElementById('input').value;
  var result = search(movies, name);  // <-- change to use the new search fn
  if (result) {
    console.log('Nothing found');
  } else {
    console.log('Go to ' + result.video_url);
  }
});

使用 ES5 ，您还可以通过以下方式进行操作：

const data = [{ "video_url": "http://63.237.48.3/ipnx/media/movies/Zane_Ziadi_HQ.mp4", "title": "Zane Ziadi" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/DarBastAzadiHQ.mp4", "title": "Darbast Azadi" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Cheghadr_Vaght_Dari_HQ.mp4", "title": "Cheghadr Vaght Dari" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Mashaal_HQ.mp4", "title": "Mashaal" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Red_Carpet_HQ.mp4", "title": "Red Carpet" } ]

const search = function(data, term) {
  return data.find(function(x) {
    return x.title.toLowerCase().indexOf(term.toLowerCase()) >= 0 })
} 

console.log(search(data, 'azadi'))
console.log(search(data, 'Red'))
console.log(search(data, 'zan'))

使用 ES6 ，它就是：

const data = [{ "video_url": "http://63.237.48.3/ipnx/media/movies/Zane_Ziadi_HQ.mp4", "title": "Zane Ziadi" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/DarBastAzadiHQ.mp4", "title": "Darbast Azadi" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Cheghadr_Vaght_Dari_HQ.mp4", "title": "Cheghadr Vaght Dari" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Mashaal_HQ.mp4", "title": "Mashaal" }, { "video_url": "http://63.237.48.3/ipnx/media/movies/Red_Carpet_HQ.mp4", "title": "Red Carpet" } ]

const search = (data, term) => 
  data.find(({title}) => title.toLowerCase().includes(term.toLowerCase()))

console.log(search(data, 'azadi'))
console.log(search(data, 'Red'))
console.log(search(data, 'zan'))

请注意，这不是一种超级性能的方法，如果您要以这种方式搜索成百上千的文档，效果将会不佳。您需要研究其他方法（二进制搜索等）来解决此问题。

如何用lodash区分大小写包含搜索

1 个答案: