JSONToArray Bug

[TR-i]

When converting a JSON string to a Livecode array, empty Javascript arrays are converted to plain empty variables. This causes errors when converting back to JSON (then parsing in Javascript). Javascript expects an empty array to be 2 brackets... []. Executing code will no longer see the variable as an array.

[andresdt]

Hi @TR-i

Yesterday when we read your post, at first it seemed to us that it was not a mistake
Rather, it was about how data is represented in LiveCode vs JavaScript. But then we wonder if it would be possible to represent an empty array in LiveCode.

Well, if you can:

Code: Select all

put empty in tArray[1]

This would fix the problem with [] representing arrays in JS. But we were missing the empty JS objects {}.

Code: Select all

put empty in tArray[empty]

And that's it, this way we can prevent JSON arrays and objects from being converted to plain variables.
So we have updated our JSON handling library with this feature.

You can find it here: https://ferruslogic.com/product/PhotonJSON

If PhotonJSON helps you solve your problem and if you think the project deserves it. Leave us a star on github, to continue developing this library.
https://github.com/Ferruslogic/PhotonJSON

[stam]

very nice @andresdt!

[andresdt]

Thank you @Stam on behalf of myself and my partner @prometheus. For your words and for your star on Github

[TR-i]

Converting JSON to array seems to be working correctly, but not back to JSON.

This going in: "list":{}

Becomes this when converted back to JSON: "list":{"1":"","":""}

[andresdt]

Was that with the library?

[andresdt]

I have tried the example you provide and here it works OK

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put JSONStringify(JSONParser( "{"& quote &"list"& quote &":{}}" ))  --> Returns {"list": {}} 

[TR-i]

Example should have been “list”:[] (brackets, not curly braces).

Looks like arrays (brackets) are being converted to objects (curly braces).

[andresdt]

Example should have been “list”:[] (brackets, not curly braces).

Looks like arrays (brackets) are being converted to objects (curly braces).

Hi @TR-i

You are using the latest version of the PhotonJSON library?

https://github.com/Ferruslogic/PhotonJS ... codescript

try with

Code: Select all

put JSONStringify(JSONParser( "{"& quote &"list"& quote &":[]}" )) --> {"list": []}

It worked well for me.
Please confirm whether or not you are using the PhotonJSON library. Since this was where this was fixed.

[TR-i]

Yes, using the latest.

Translating back and forth inside Livecode would obviously work. However, results are inconsistent when you actually hand the JSON to Javascript to translate back into objects.

Also, while I installed the library using the installer stack, standalone apps failed to find it.