JSON Functions

This topic describes the function you can use to manipulate JSON data.

Function	Description and Example
JSON.parse(str)	Converts a string to a JSON object. JSON.parse('{"a":1}'); The above example returns the JSON object {"a":1}. If this object is sent to an output property of the Script dataflow block, the object is converted to a string, and the block property holds a string.
JSON.stringify(obj)	Converts a JSON object to a string. The following example returns the string {"a":1}. var json = JSON.parse('{"a":1}'); JSON.stringify(json);

Function

Description and Example

JSON.parse(str)

Converts a string to a JSON object.

JSON.parse('{"a":1}');

The above example returns the JSON object {"a":1}. If this object is sent to an output property of the Script dataflow block, the object is converted to a string, and the block property holds a string.

JSON.stringify(obj)

Converts a JSON object to a string.

The following example returns the string {"a":1}.

var json = JSON.parse('{"a":1}');
					JSON.stringify(json);

JSON Function Example

The following example uses a for loop to print the IDs of each item in a JSON object and to print rows of dashes to represent null items.

json = {"menu": {
			"header": "SVG Viewer",
			"items": [
			{"id": "Open"},
			{"id": "OpenNew", "label": "Open New"},
			null,
			{"id": "ZoomIn", "label": "Zoom In"},
			{"id": "ZoomOut", "label": "Zoom Out"},
			{"id": "OriginalView", "label": "Original View"},
			null,
			{"id": "Quality"},
			{"id": "Pause"},
			{"id": "Mute"},
			null,
			{"id": "Find", "label": "Find..."},
			{"id": "FindAgain", "label": "Find Again"},
			{"id": "Copy"},
			{"id": "CopyAgain", "label": "Copy Again"},
			{"id": "CopySVG", "label": "Copy SVG"},
			{"id": "ViewSVG", "label": "View SVG"},
			{"id": "ViewSource", "label": "View Source"},
			{"id": "SaveAs", "label": "Save As"},
			null,
			{"id": "Help"},
			{"id": "About", "label": "About SVG Viewer..."}
			]
			}};
			print(json.menu.header);
			for (var i = 0; i < json.menu.items.length; i++) {
			if (json.menu.items[i] == null)
			{
			print("----");
			}
			else
			{
			print(json.menu.items[i].id);
			}
		}

The output for this example is the following:

SVG ViewerOpenOpenNew----ZoomInZoomOutOriginalView----QualityPauseMute----FindFindAgainCopyCopyAgainCopySVGViewSVGViewSourceSaveAs----HelpAbout