Re: [fpc-pascal] Parse JSON

[Michael Van Canneyt via fpc-pascal]

On Fri, 23 Jun 2023, Darius Blaszyk via fpc-pascal wrote:


Hi all,

I've hardly done anything with JSON in Freepascal before, so apologies for 
the trivial question. I want to traverse an array in JSON and retrieve the 
elements (which I don't know what they are in advance) one by one. An example 
of the JSON file is given below.


"keywords": {
 "key": "value",
 "key1": "value1",
 "key2": "value2"
},

Ideally, I'd like to be able to stick to the FPC out-of-the-box library. Any 
help would be appreciated.




Something like:

uses classes, fpjson;

var
  J : TJSONObject;
  F : TFileStream;

begin
  J:=nil;
  F:=TFileStream.Create('yourfile.json',fmOpenRead);
  try
J:=GetJSON(F) as TJSONObject;
For I:=0 to J.Count-1 do
  Writeln(J.Names[i],' : ',J.AsString);
  finally
J.Free;
F.Free;
  end;
end.

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Re: [fpc-pascal] Parse JSON

[Thomas Kurz via fpc-pascal]

fpJson fully supports JSON:

https://www.freepascal.org/docs-html/fcl/fpjson/index.html
https://wiki.lazarus.freepascal.org/JSON

There's also JSON support in the LGenerics package, but it's not a bundled 
package as far as I know.

Thomas


- Original Message - 
From: Darius Blaszyk via fpc-pascal 
To: FPC-Pascal users discussions 
Sent: Friday, June 23, 2023, 16:02:26
Subject: [fpc-pascal] Parse JSON

Hi all,

I've hardly done anything with JSON in Freepascal before, so apologies 
for the trivial question. I want to traverse an array in JSON and 
retrieve the elements (which I don't know what they are in advance) one 
by one. An example of the JSON file is given below.

"keywords": {
   "key": "value",
   "key1": "value1",
   "key2": "value2"
},

Ideally, I'd like to be able to stick to the FPC out-of-the-box library. 
Any help would be appreciated.

Rgds, Darius

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[fpc-pascal] Parse JSON

[Darius Blaszyk via fpc-pascal]

Hi all,

I've hardly done anything with JSON in Freepascal before, so apologies 
for the trivial question. I want to traverse an array in JSON and 
retrieve the elements (which I don't know what they are in advance) one 
by one. An example of the JSON file is given below.


"keywords": {
  "key": "value",
  "key1": "value1",
  "key2": "value2"
},

Ideally, I'd like to be able to stick to the FPC out-of-the-box library. 
Any help would be appreciated.


Rgds, Darius___
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