jquery數組排序不按預期工作

Question

這是我的數組，我試圖對它進行排序。但它沒有按預期工作。我想按降序對名稱進行排序..我該怎麼做？

var d = '{"success":"1","message":[{"_id":"591b39df358f1d1f843231d1","area":"chennai","food":"idly","name":"saravana bavan","__v":0},{"_id":"591b39e0358f1d1f843231d2","area":"Dindigul","food":"Dosa","name":"Kattu Briyani","__v":0},{"_id":"591b39df358f1d1f843231d4","area":"Tirupur","food":"Poori","name":"French Loaf","__v":0}]}'; 
 
console.log(d); 
 
var results = jQuery.parseJSON(d); 
 
console.log(results.message); 
 
results.message.sort(function(a, b) { 
 
    return b.name- a.name; 
 
}); 
 
console.log(results.message);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

這是我Fiddle

Answer 1

你不能對字符串進行數學運算。

results.message.sort(function(a, b) { 
    if (b.name > a.name) { return 1 } 
    else if (b.name < a.name) { return -1 } 
    else { return 0 } 
}); 

由於@bergi在下面的評論中提到。 This深入解釋了這個問題。

Answer 2

只是改變你的比較功能如下：

var d = '{"success":"1","message":[{"_id":"591b39df358f1d1f843231d1","area":"chennai","food":"idly","name":"saravana bavan","__v":0},{"_id":"591b39e0358f1d1f843231d2","area":"Dindigul","food":"Dosa","name":"Kattu Briyani","__v":0},{"_id":"591b39df358f1d1f843231d4","area":"Tirupur","food":"Poori","name":"French Loaf","__v":0}]}'; 
console.log(d); 
var results = jQuery.parseJSON(d); 
console.log(results.message); 
results.message.sort(function(a, b) { 
    return b.name.toLowerCase() > a.name.toLowerCase() ? 1 : -1; 
}); 
console.log(results.message);