JSON array name.

[alnickels 0]

I have a JSON object that has two arrays.  How can I retrieve the name of the array before I loop through all of the roes / elements?  I am not sure if this is called an array name or a key. 

[Der schöne Günther 306]

An array is just an element, like any other. A Json Object is made up of pairs. Every pair has a name and a value. A value can be an array, text, float, ...

 

Here is an example:

program Project1;

uses System.SysUtils, System.JSON;

const
	input =
		'{'+
		'	"someNumbers": [1,2,3],'+
		'	"justOneNumber": 42,'+
		'	"some Texts": ["Hello World", "My body is ready"]'+
		'}';
var
	jsonObject: TJsonObject;
	pair: TJsonPair;
begin
	jsonObject := TJsonObject.ParseJSONValue(input) as TJsonObject;
	for pair in jsonObject do
		if(pair.JsonValue is TJsonArray) then
			WriteLn('We found an array called "', pair.JsonString.Value(), '"');

	ReadLn;
end.

 

It will output the following:

We found an array called "someNumbers"
We found an array called "some Texts"

 

Edited February 25, 2021 by Der schöne Günther