array : list or Array

Specifies the data structure to use for parsed data corresponding to JSON arrays (sequential data delimited with square brackets). With array=list (the default), a JSON array is encoded as a list; with array=Array, it is encoded as an Array.

object : one of equationset, DataSeries, record, or table

Specifies the data structure to use for parsed data corresponding to so-called JSON objects. These are collections of key/value pairs which when encoded in JSON are enclosed in curly braces ({}). The option affects any JSON objects in the input, but not other types of structured data, such as lists.

With object=table (the default), an object is encoded as table; with object=record, it is encoded as a record; with object=DataSeries, it is encoded as a DataSeries; with object=equationset, it is encoded as a set of equations.

output : one of equationset, DataSeries, record, or table

A legacy alias for the object option. Its behavior is identical to that of object.

ParseString(jsonString) parses the input string jsonString, which is assumed to be valid JSON.

with(JSON):

myTable := ParseString("{\"fruit\": \"orange\", \"count\": 23}");

$\mathrm{myTable}≔table\left(\left[''fruit''=''orange''\,''count''=23\right]\right)$

myTable["fruit"];

$''orange''$

myRecord := ParseString("{\"fruit\": \"orange\", \"count\": 23}",object=record);

$\mathrm{myRecord}≔{\mathrm{Record}}_{\mathrm{packed}}\left(\mathrm{fruit}=''orange''\,\mathrm{count}=23\right)$

myRecord["fruit"];

$''orange''$

CityData := "[{\"name\": \"Bangalore\", \"population\": 8443675, \"country\": \"India\"}, {\"name\": \"Kinshasa\", \"country\": \"Democratic Republic of the Congo\", \"population\": 10125000}, {\"name\": \"Paris\", \"country\": \"France\", \"population\": 2229621}, {\"name\": \"Tokyo\", \"country\": \"Japan\", \"population\": 13617445}]";

$\mathrm{CityData}≔''[\{"name":\; "Bangalore",\; "population":\; 8443675,\; "country":\; "India"\},\; \{"name":\; "Kinshasa",\; "country":\; "Democratic\; Republic\; of\; the\; Congo",\; "population":\; 10125000\},\; \{"name":\; "Paris",\; "country":\; "France",\; "population":\; 2229621\},\; \{"name":\; "Tokyo",\; "country":\; "Japan",\; "population":\; 13617445\}]''$

Cities := JSON:-ParseString(CityData);

$\mathrm{Cities}≔\left[table\left(\left[''population''=8443675\,''country''=''India''\,''name''=''Bangalore''\right]\right)\,table\left(\left[''population''=10125000\,''country''=''Democratic\; Republic\; of\; the\; Congo''\,''name''=''Kinshasa''\right]\right)\,table\left(\left[''population''=2229621\,''country''=''France''\,''name''=''Paris''\right]\right)\,table\left(\left[''population''=13617445\,''country''=''Japan''\,''name''=''Tokyo''\right]\right)\right]$

seq( city["name"], city in Cities );

$''Bangalore'',''Kinshasa'',''Paris'',''Tokyo''$

The JSON[ParseString] command was introduced in Maple 2015.

For more information on Maple 2015 changes, see Updates in Maple 2015.

The JSON[ParseString] command was updated in Maple 2022.

The array and object options were introduced in Maple 2022.

For more information on Maple 2022 changes, see Updates in Maple 2022.