Szathmáry László honlapja @ DEIK

(1) process an array

// longer version:

import std.stdio;
import std.json;

void main()
{
string jsonStr = `["Adam", "Bob", "Cleo"]`;

JSONValue jsonObj = parseJSON(jsonStr);

foreach (item; jsonObj.array)
{
string name = item.str;
writeln(name);
}
}

// shorter version:

import std.stdio;
import std.json;
import std.algorithm; // map()
import std.array; // .array()

void main()
{
string jsonStr = `["Adam", "Bob", "Cleo"]`;

auto jsonObj = parseJSON(jsonStr);

string[] names = jsonObj.array.map!(item => item.str).array;
foreach (name; names)
{
writeln(name);
}
}

Output in both cases:

Adam
Bob
Cleo

(2) process an object
// common part import std.stdio; import std.json; import std.algorithm; // map() import std.array; // .array() void main() { string jsonStr = ` { "last": "Doe", "first": "John", "age": 39, "sex": "M", "registered": true, "salary": 70000, "daughter": { "first": "Jane", "sex": "F", "age": 18 } } `; auto jsonObj = parseJSON(jsonStr); }
foreach (key, value; jsonObj.object) { writeln(key, " -> ", value); }	first -> "John" age -> 39 registered -> true sex -> "M" last -> "Doe" salary -> 70000
long age = jsonObj["age"].integer; writeln(age); // 39 bool status = jsonObj["registered"].boolean; writeln(status); // true long daughterAge = jsonObj["daughter"]["age"].integer; writeln(daughterAge); // 18	Note: `.integer()` returns a long, not an int
// alternative way: string first = jsonObj["first"].get!string; writeln(first); // John int age = jsonObj["age"].get!int; writeln(age); // 39 bool status = jsonObj["registered"].get!bool; writeln(status); // true int daughterAge = jsonObj["daughter"]["age"].get!int; writeln(daughterAge); // 18	Note: `.get!<type>` will convert the value to the given type. We can specify any type, e.g. int too.

Reading JSON