jQuery 有 hashtable 类型的可变数据结构吗？

发布于 2024-11-05 00:21:46 字数 414 浏览 0 评论 0原文

伪代码可能是展示我想要在 jQuery 中执行的操作的最佳方式：

$(selector).each(function() {
    // pull data from LI tags or whatever, store in variables (imgURL, tagline, summary)
    $someDataStructure.add({imgURL, tagline, summary});
});

然后稍后...参考结构

 $someDataStructure.each(function() {
     var x = $someDataStructure['imgURL'];
     // etc.
 });

关于如何执行此操作有什么建议吗？

原文

Pseudo-code is probably the best way to show what I'm looking to do in jQuery:

$(selector).each(function() {
    // pull data from LI tags or whatever, store in variables (imgURL, tagline, summary)
    $someDataStructure.add({imgURL, tagline, summary});
});

Then later... reference the structure

 $someDataStructure.each(function() {
     var x = $someDataStructure['imgURL'];
     // etc.
 });

Any suggestions on how I could go about doing this?

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乙白 2024-11-12 00:21:46

jQuery 就是 JavaScript，而 JavaScript 有对象。您可以像 C++ 映射或 C# 字典一样使用 JS 对象。例如，您可以创建一个对象数组并具有可以命名的索引：

var liTags = [];

$(selector).each(function() {
   // pull data from LI tags or whatever
   //store in variables (imgURL, tagline, summary)
   liTags.push({'imgURL': imgURL, 'tagline': tagline, 'summary': summary});
});

然后：

for(int i = 0; i < liTags.length; ++i) {
   var imgURL = liTags[i]['imgURL']; //or liTags[i].imgURL;
}

jQuery is just JavaScript, and JavaScript has objects. You can use JS Objects similarly to a C++ map or C# Dictionary. For example, you can create an array of objects and have indices that you can name:

var liTags = [];

$(selector).each(function() {
   // pull data from LI tags or whatever
   //store in variables (imgURL, tagline, summary)
   liTags.push({'imgURL': imgURL, 'tagline': tagline, 'summary': summary});
});

Then later:

for(int i = 0; i < liTags.length; ++i) {
   var imgURL = liTags[i]['imgURL']; //or liTags[i].imgURL;
}

回复收藏 0 原文

心作怪 2024-11-12 00:21:46

您实际上可以使用 data api 将数据附加到 jquery 元素，

所以在行：

$(selector).each(function() {
    /* I suppose here you have three available variables named:
       imgURL, tagline, summary
        that you got from the element itself or from somewhere else
     */
    $(this).data({imgURL: imgURL, tagline: tagline, summary:summary })
    /* you could also write it {'imgURL': imgURL, etc. } if it looks clearer: the first is the hashtable key, the second a variable containing the value */
}

然后从每个 jquery 元素中检索它！

$(selector).data()

或

$(selector).data('imgURL')

用于将“哈希表”附加到元素。

在 javascript 中，有“关联数组”（哈希表）。

您可以将它们写为：
myarray = {key:'value'}

您可以

根据需要通过以下方式访问它们：myarray['attribute'] 或 myarray.attribute

附言。请注意，我没有在那里测试代码，它可能需要一些小的调整

You can actually attach data to a jquery element using the data api

So do something in the lines of:

$(selector).each(function() {
    /* I suppose here you have three available variables named:
       imgURL, tagline, summary
        that you got from the element itself or from somewhere else
     */
    $(this).data({imgURL: imgURL, tagline: tagline, summary:summary })
    /* you could also write it {'imgURL': imgURL, etc. } if it looks clearer: the first is the hashtable key, the second a variable containing the value */
}

and then just retrieve it from each jquery element!