Hi Alex,
the JSONtoArray() function is part of the mergJSON external.
The README of this external describes how to use this function
and it's counterpart JSONtoArray as follows:
This external has been implemented to encode/decode UTF8 JSON to a LiveCode
array as quickly as possible. Currently externals can not work with
multi-dimensional LiveCode arrays so the intention is it is used with two
functions like this:
-- pArray - array to be encoded
-- pForceRootType - can force the root to be an object if it looks like
an array
-- pPretty - include whitespace
function ArrayToJSON pArray,pForceRootType,pPretty
repeat for each key tKey in pArray
if pArray[tKey] is an array then
put "}"&ArrayToJSON(pArray[tKey]) into pArray[tKey]
end if
end repeat
return(mergJSONEncode("pArray",pForceRootType,pPretty))
end ArrayToJSON
function JSONToArray pJSON
local tArray,tKeys
repeat for each line tKey in mergJSONDecode(pJSON,"tArray")
put JSONToArray(tArray[tKey]) into tArray[tKey]
end repeat
return tArray
end JSONToArray
For most cases the above is all the documentaion you will need. There are
however some quirks to the external you might need to know about.
Another option would be to load the JSON extension and to use
the JsonImport() function.
Ralf
On 23.06.22 01:31, Alex Tweedly via use-livecode wrote:
On 22/06/2022 17:02, Richard Gaskin via use-livecode wrote:
[ ... about using JSON ... ]
But if you don't need interoperability, you wouldn't need to write a
parser, since LC includes a good one built into the engine.
What did I miss?
The fact that Livecode's support for JSON is, hmmm, mediocre at best ??
The parser "built-in" seems to work fine in the IDE, but not on the
server :
<?lc
set the errormode to inline
put the version
put "{'name':'asdf'}" into t
replace "'" with quote in t
put JSONtoarray(t) into tA
put the keys of tA
fails with -
file "/home/alextwee/public_html/rampuk/tJSON.lc"
row 7, col 5: Function: error in function handler (JSONtoarray)
row 7, col 5: put: error in expression
(there's no mention of any platform restricitons in the dictionary).
I tried copying in the sample ode for wrapping JSONToArray around
mergJSONDecode,
which then fails with "error in function handler mergJSONDecode.
(I must admit I encountered this a while ago, figured it was probably a
temporary issue
so I replaced JSON by LSON, and forgot all about it.) This discussion
prompted me to re-try it.
I can't believe this problem isn't causing widespread problems, so it's
probably
something specific about me, or my on-rev account. If anyone has
suggestions, I'll
try them; if not, I'll put it as a bug report into QCC see what happens.
Alex.
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