Using variables in llJsonGetValue

[GloriaGlitter]

I've started experimenting with bringing in live data via API calls to external services, particularly those that present their output in json format.  This is to provide extra functionality to my AI bot.

So far I've got live weather reports working very nicely.  Currently I'm working with live currency exchange rates.

My question is can I use a string variable in my  llJsonGetValue statement in place of a value?

To explain further, after the http call, variable  'body' is set to  {"rates":{"USD":1,"AED":3.67,"ARS":78.93,"AUD":1.38,"GBP":0.761,"GTQ":7.78,"HKD":7.75,"HRK":6.37}}  (actual list has over 100 currencies)

Variable  'exchange_curr' is set to whatever currency the user is interested in, e.g. "GBP".

rate = llJsonGetValue( body, ["rates", "GBP"])  gives the desired result whereas rate = llJsonGetValue( body, ["rates", exchange_curr]) fails to provide a result. 

Does it always have to be actual data like "GBP" in the json expression and not a variable like 'exchange_curr' that holds this data?

[Wulfie Reanimator]

It's hard to make any definitive conclusions without seeing the involved code, but most likely, exchange_curr is not actually set correctly.

Functions can't know whether they've been given a variable or its data, there's no distinction in LSL.

This works, for example:

string json = "{\"rates\":{\"USD\":1,\"AED\":3.67,\"ARS\":78.93,\"AUD\":1.38,\"GBP\":0.761,\"GTQ\":7.78,\"HKD\":7.75,\"HRK\":6.37}}";
string exchange_curr = "GBP";

llOwnerSay(llJsonGetValue(json, ["rates", exchange_curr]));

 

Edited November 7, 2020 by Wulfie Reanimator

[GloriaGlitter]

doh - what a newbie error - you were right - there was a spurious space in the data that didn't show when I checked via llOwnerSay.  All sorted now.  Thanks