output : name

either table, record, or DataSeries. Specifies the data structure to use for parsed data corresponding to JSON objects (collections of key/value pairs). With output=table (the default), an object is encoded as table; with output=record, it is encoded as a record; with output=DataSeries, it is encoded as a DataSeries.

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

with(JSON):

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

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

myTable["fruit"];

$''orange''$

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

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

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);

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

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 2016.