Is there a way to get the length for result of a path?

[prashantagarwal]

I have a JSON

{
    collection: [{
      prop: {}
    },{
      prop: 2
    }]
}

and I have the path as collection[*].prop@integer(). I want to know the size of the result, which should be 1 in this case.

[brettz9]

Is there some reason you can't just get length on the resulting array?

[prashantagarwal]

@brettz9 I am using JsonPath in a rule engine. I want to keep my path generic and therefore thought that it would be great if there is a way to do it.

[brettz9]

@prashantagarwal : No, we still don't have the expressiveness of XPath (not to mention XQuery), though a PR would be welcome...

[prashantagarwal]

@brettz9 Doing something like this will solve a lot of my use cases.

[brettz9]

Though I haven't taken a close look, from a quick overview JSONata looks quite exciting...

[flodaniel]

Hello,

why was this issue closed?
This is quite a downfall, because filtering becomes a lot less powerful without being able to work with the result array afterwards..

[brettz9]

The original poster perhaps closed it due to a relative lack of maintenance of this repository and my mentioning JSONata as an interesting looking project.

PRs would be welcome, but see #124 on our wishing to first see proposals be made as part of a standardization process so that different jsonpath implementations do not end up differing so much.