比较价目表，找到失踪者

问题描述

在以下JSON数据中，A项目的防过敏字符串中包含麸质"，而B项目则没有.我可以在A项目中添加<h4>Yes</h4>，但我也想在B项目中添加<h4>No</h4>，因为它在字符串中不包含面筋".其他无过敏值也是如此.

In the following JSON data, A item has "gluten" in the allergyfree string while B item doesn't. I can add a <h4>Yes</h4> to A item but I also want to add a <h4>No</h4> to B item since it doesn't contain "gluten" in the string. The same goes for the other allergyfree values.

是否可以在循环中比较A项目和B项目之间的防过敏字符串，以便如果该项目具有值(例如面筋)，则打印<h4>Yes</h4>，如果缺少，则打印<h4>No</h4>?

Is there any way to compare the allergyfree strings between A item and B item in the loop, so that if the item has the value, for example, gluten, then print <h4>Yes</h4>, if missing, print <h4>No</h4>?

[{"title":"A Item","allergyfree":"sugar,salt,yeast,wheat,gluten"},{"title":"B Item","allergyfree":"sugar,salt,starch,yeast,wheat,preservatives"}]

代码:

$.ajax({
    url: source.json,
    success: function (data) {
        var item_html;

        $(data).each(function (index, item) { 
         var allergyfree = item.allergyfree;           
         if(allergyfree.length !== 0) {

           allergyfree = allergyfree.split(",");

           $.each(allergyfree,function(i,allergy){

            if (?????????????????) 
             {
               $('.'+ allergy).html('<h4>Yes</h4>') 
             }
            else
             { 
               $('.'+ allergy).html('<h4>No</h4>')
             }

           });
          }

        });
    },
    error: function () {}
});

HTML

    <table>
       <tr><th colspan="3">A Item</th></tr>
       <tr><td class="gluten"></td>
       <td class="sugar"></td>
       <td class="yeast"></td></tr>
   </table>


    <table>
       <tr><th colspan="3">B Item</th></tr>
       <tr><td class="gluten"></td>
       <td class="sugar"></td>
       <td class="yeast"></td></tr>
   </table>

推荐答案

您可以使用 $ .inArray函数返回项目在数组中的位置，如果不存在则返回-1:

You could use $.inArray function it returns position of item in array and -1 if item is not present :

if ($.inArray(alergy,allergyfree)!=-1) 

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