ajax响应后如何在Javascript中按Desc过滤答案

【问题标题】：How to filter by Desc in Javascript after ajax responseajax响应后如何在Javascript中按Desc过滤
【发布时间】：2017-08-03 02:45:46
【问题描述】：

Ajax 响应我得到这样的结果：

"students":[{
"student_id":"27",
"job_id":"12",
"128":"8",
"63":"9",
"3":"10",
"weightage":"5.6000"}
,{"student_id":"22",
"job_id":"12",
"128":"5",
"63":"6",
"3":"8",
"weightage":"9.1000"
}]}

从这里我想显示相同的顺序，因为权重（总分）很高，它应该排在最后。

如何按 Desc 过滤？这是我的代码：

console.log(response['students']);
$.each(response['students'], function(k, student) {                 
    $("#stu"+student.student_id).removeClass('btn-danger reject-student');                  
    $("#stu"+student.student_id).addClass('btn-success select-student');                    
    $("#stu"+student.student_id).text('Student Selected');                  
});             
/*Sorting select-student students at one place starts here*/                
var rows = document.querySelectorAll('table tbody tr.sorted');              
for (i = 0; i < rows.length; i++) {                 
    if (rows[i].querySelector('span.reject-student')) {                     
        rows[i].closest('tbody').appendChild(rows[i]);                      
    }                   
}               
/*Sorting select-student students at one place ends here*/

【问题讨论】：

当您说“过滤器”时，您的意思是“排序”吗？而“desc”的意思是“下降”？（您的问题标题“按 Desc 过滤”听起来您想根据描述字段过滤掉数据......）
对不起，我的意思是排序
为什么不在服务器端使用 asort 对数组进行排序，然后以 json 格式发送响应。

标签： javascript php ajax filter

【解决方案1】：

var rows = document.querySelectorAll('table tbody tr.sorted');      
$.each(response['students'], function(k, student) {     
    $("#stu"+student.student_id).removeClass('btn-danger reject-student');                  
    $("#stu"+student.student_id).addClass('btn-success select-student');                    
    $("#stu"+student.student_id).text('Student Selected');  
    /*  Sorting by student overall score starts here   */
    for (i = 0; i < rows.length; i++) {                 
        if (rows[i].querySelector('span#stu'+student.student_id)) {                     
            rows[i].closest('tbody').appendChild(rows[i]);                      
        }                   
    }
    /*  Sorting by student overall score ends here   */
});

【讨论】：

【解决方案2】：

这很简单。将您的响应 JSON 字符串解析为一个对象。请尝试以下方法：

// Array of student objects
var students = JSON.parse("Your response json string");

//Sort this array by weightage property in descending order
students.sort(function(a,b){
   return b.weightage - a.weightage; // descending order
});

请看下面的小提琴：

var response = '[{"student_id": "27","job_id": "12","128": "8","63": "9","3": "10","weightage": "5.6000"}, {"student_id": "22","job_id": "12","128": "5","63": "6","3": "8","weightage": "9.1000"}]';

var students = JSON.parse(response);

students.sort(function(a,b){
   return b.weightage - a.weightage; // descending order
});

alert(students[0].weightage);
alert(students[1].weightage);

希望这会有所帮助:)

【讨论】：

这是有效的。我已经更新了我的答案。请参阅小提琴 :) 请将其标记为答案，如果对您有帮助，请点赞。谢谢:)
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
您的 Json 字符串无效。请在给定的小提琴中查看有效的 json 格式。谢谢:)
这是有效的 json 字符串。请将您的与此进行比较： var response = '[{"student_id": "27","job_id": "12","128": "8","63": "9","3": "10 ","weightage": "5.6000"}, {"student_id": "22","job_id": "12","128": "5","63": "6","3": "8 ","weightage": "9.1000"}]';
@AbdulWaheed - 是的。我提供的解决方案按权重降序对数组进行排序。