javascript中的JSON长度返回字符数,而不是数组元素数
嗨,我有问题,我尝试过类似的方法并给出了答案,但Object.keys(data.length)对我都没有帮助。这是我的JSONjavascript中的JSON长度返回字符数,而不是数组元素数,javascript,arrays,json,wordpress,Javascript,Arrays,Json,Wordpress,嗨,我有问题,我尝试过类似的方法并给出了答案,但Object.keys(data.length)对我都没有帮助。这是我的JSON { "POSTS": [ [ { "term_id": 1, "name": "Uncategorized", "slug": "uncategorized", "term_group": 0,
{
"POSTS": [
[
{
"term_id": 1,
"name": "Uncategorized",
"slug": "uncategorized",
"term_group": 0,
"term_taxonomy_id": 1,
"taxonomy": "category",
"description": "",
"parent": 0,
"count": 1,
"filter": "raw",
"cat_ID": 1,
"category_count": 1,
"category_description": "",
"cat_name": "Uncategorized",
"category_nicename": "uncategorized",
"category_parent": 0
},
{
"term_id": 2,
"name": "Nova",
"slug": "nova",
"term_group": 0,
"term_taxonomy_id": 2,
"taxonomy": "category",
"description": "",
"parent": 0,
"count": 1,
"filter": "raw",
"cat_ID": 2,
"category_count": 1,
"category_description": "",
"cat_name": "Nova",
"category_nicename": "nova",
"category_parent": 0
},
{
"term_id": 3,
"name": "nova1",
"slug": "nova1",
"term_group": 0,
"term_taxonomy_id": 3,
"taxonomy": "category",
"description": "",
"parent": 0,
"count": 1,
"filter": "raw",
"cat_ID": 3,
"category_count": 1,
"category_description": "",
"cat_name": "nova1",
"category_nicename": "nova1",
"category_parent": 0
},
{
"term_id": 4,
"name": "nova2",
"slug": "nova2",
"term_group": 0,
"term_taxonomy_id": 4,
"taxonomy": "category",
"description": "",
"parent": 3,
"count": 1,
"filter": "raw",
"cat_ID": 4,
"category_count": 1,
"category_description": "",
"cat_name": "nova2",
"category_nicename": "nova2",
"category_parent": 3
},
{
"term_id": 5,
"name": "nova3",
"slug": "nova3",
"term_group": 0,
"term_taxonomy_id": 5,
"taxonomy": "category",
"description": "",
"parent": 3,
"count": 1,
"filter": "raw",
"cat_ID": 5,
"category_count": 1,
"category_description": "",
"cat_name": "nova3",
"category_nicename": "nova3",
"category_parent": 3
}
]
],
"success": 1
}
下面是我的javascript代码:
<select id ="new" name="new"></select>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
$(document).ready(function(e) {
var select = document.getElementById("new");
$.ajax({
type: "POST",
url: "wp-content/themes/twentyfourteen/ajax.php", // this script returns my JSON
data: ({canum: 0}),
success: function(data){
console.log(Object.keys(data).length);
}
});
});
</script>
$(文档).ready(函数(e){
var select=document.getElementById(“新”);
$.ajax({
类型:“POST”,
url:“wp-content/themes/twentyreeven/ajax.php”//此脚本返回我的JSON
数据:({canum:0}),
成功:功能(数据){
console.log(Object.key(data.length));
}
});
});
这将返回1445作为长度,而不是我需要的5,如何获取JSON中的段数
如何获取5而不是字符数
你能帮我吗?谢谢。您需要
JSON.解析数据。在您的情况下,它不是作为application/json
发送的,而是作为text/html
发送的
您的成功功能应该执行以下操作:
success: function(data){
data = JSON.parse(data);
console.log(Object.keys(data).length);
}
作为替代方案,
但是,如果您不想JSON.parse
数据并让jQuery管理它,您可以尝试这样做。您可以在config对象中从服务器传递所需的数据类型
:
$.ajax({
type: "POST",
url: "wp-content/themes/twentyfourteen/ajax.php", // this script returns my JSON
data: ({canum: 0}),
success: function (data) {
console.log(Object.keys(data).length);
},
dataType: 'json' // <- Add this
});
$.ajax({
类型:“POST”,
url:“wp-content/themes/twentyreeven/ajax.php”//此脚本返回我的JSON
数据:({canum:0}),
成功:功能(数据){
console.log(Object.key(data.length));
},
dataType:'json'//在你解析之前,你的json将只是一个字符串,对吗?正如这家伙所说的……解析它最简单的方法就是在ajax请求中添加dataType:'json'
。@KevBot非常感谢你在我打开android应用程序的那一刻,我想起我需要进行解析。谢谢你的解决方案和答案。