Streaming spn/spf not a double

[LiamP]

Documentation lists spn/spf as the following:

"spn": {
"type": "number",
"description": "Starting Price Near - The far starting price (or null if un-changed)",
"format": "double"
},
"spf": {
"type": "number",
"description": "Starting Price Far - The far starting price (or null if un-changed)",
"format": "double"
},

Yet sometimes the following is returned:

{"spn":"Infinity","spf":"NaN","id":10660857}

Using golang so not sure how I can get round this when parsing the json streaming response, as far as standards go I am fairly sure its not correct to vary the response from a string to a double. How are others getting around this? I can see in the example code double is used which I assume would cause an error

[jabe]

I haven't used Go.

I found this https://stackoverflow.com/questions/...in-go-language
where someone has suggested you use a type switch (which looks rather like the equivalent of Select Case (Or Evaluate, for us Cobol II oldies)).

So something like

func (e *Easy)SetOption(option Option, param interface{}) {

    switch v := param.(type) { 
    default:
        fmt.Printf("unexpected type %T", v)
    case uint64:
        e.code = Code(C.curl_wrapper_easy_setopt_long(e.curl, C.CURLoption(option), C.long(v)))
    case string:
        e.code = Code(C.curl_wrapper_easy_setopt_str(e.curl, C.CURLoption(option), C.CString(v)))
    } 
}

but better. You have to check it for NULL in any case, so adding a check for text isn't going to be a huge leap.

Maybe.

[LiamP]

Hmm the issue is that I am providing a struct to a json function which then deals with the parsing. Starting to think that without rolling my own json parser and incorporating the above I don't think it's possible.

Does the java / csharp example code error at this or can it be handled?

[jabe]

I'm using VB.NET and my current program doesn't use starting prices. Perhaps someone who does use them will comment.

The values arrive in the JSON string as a string, so in these instances you could have the receiving field defined as a string, then check the value and if it's not Null/Nan/Infinity, convert it to a double.

This came up ( https://github.com/golang/go/issues/3480 ) when I searched, but I expect you've searched and seen it anyway.