Build a JSON Object

JSON is the text format most programs use to exchange data. A JSON object is written as {"key": "value", ...}.

Given matching lists of keys and values (all text), build the JSON object string in this exact format:

• Start with { and end with }.
• Write each pair as "key": "value", in the given order, separated by , (comma and space).
• Inside a string, write a backslash \ as \\ and a double quote " as \". Other characters stay as they are.

Implement json_object_string(keys, values).

Input

keys, values: Lists of the same length.

Output

Return the JSON text. An empty object is {}.

Restricciones

0 ≤ number of pairs ≤ 100

Keys and values have at most 50 printable characters

Ejemplos

Entrada:
keys = ["name", "city"]
values = ["Ada", "London"]

Salida esperada:
expected = "{\"name\": \"Ada\", \"city\": \"London\"}"

Entrada:
std::vector<std::string> keys = {"name", "city"};
std::vector<std::string> values = {"Ada", "London"};

Salida esperada:
std::string expected = "{\"name\": \"Ada\", \"city\": \"London\"}";

Entrada:
string[] keys = new string[] {"name", "city"};
string[] values = new string[] {"Ada", "London"};

Salida esperada:
string expected = "{\"name\": \"Ada\", \"city\": \"London\"}";

Entrada:
keys = ["quote"]
values = ["say \"hi\""]

Salida esperada:
expected = "{\"quote\": \"say \\\"hi\\\"\"}"

Entrada:
std::vector<std::string> keys = {"quote"};
std::vector<std::string> values = {"say \"hi\""};

Salida esperada:
std::string expected = "{\"quote\": \"say \\\"hi\\\"\"}";

Entrada:
string[] keys = new string[] {"quote"};
string[] values = new string[] {"say \"hi\""};

Salida esperada:
string expected = "{\"quote\": \"say \\\"hi\\\"\"}";

Referencias

Este reto está adaptado para CodeUtility. Sigue el enunciado y las restricciones indicadas arriba.

• JSON specification (json.org)
• Python docs, json module