我怎么知道使用jsonpath表达式的elemets总数？

i have the next json structure:

我有下一个json结构:

    [
    {
        "entryDate": "2010-02-25",
        "nationality": "BR",
    },
    {
        "entryDate": "2010-02-25",
        "nationality": "SP",
    },
    {
        "entryDate": "2010-02-25",
        "nationality": "EU",
    }
    ]

I want, using jsonpath expression, to know the quantity of elements in my Json Array.

我希望,使用jsonpath表达式来了解我的Json数组中的元素数量。

I trying with $.length but no work.

我尝试使用$ .length但没有工作。

How can i know the total of elements using jsonpath expression?

如何使用jsonpath表达式知道元素的总数?

1 个解决方案

#1

Try

  [
{
    "entryDate": "2010-02-25",
    "nationality": "BR"
},
{
    "entryDate": "2010-02-25",
    "nationality": "SP"
},
{
    "entryDate": "2010-02-25",
    "nationality": "EU"
}
]

and then

$.length