Zig Requires Chilkat v11.0.0+

JSON: Miscellaneous Operations

See more JSON Examples

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.setEmitCompact(false);

    // Assume the file contains the data as shown above..
    json.loadFile("qa_data/json/sample2.json") catch {
        std.debug.print("{s}\n", .{try json.getLastErrorText(alloc)});
        return;
    };

    // Get the "sampleData" object:
    const sample_data = try chilkat.JsonObject.init();
    defer sample_data.deinit();
    json.objectOf2("sampleData", sample_data) catch {};

    // Demonstrate BoolAt and BoolOf
    std.debug.print("hungry: {}\n", .{sample_data.boolOf("hungry")});
    std.debug.print("hungry: {}\n", .{sample_data.boolAt(2)});

    // StringOf returns the value as a string regardless of it's actual type:
    std.debug.print("pi: {s}\n", .{try sample_data.stringOf(alloc, "pi")});
    std.debug.print("answer: {s}\n", .{try sample_data.stringOf(alloc, "answer")});
    std.debug.print("withoutValue: {s}\n", .{try sample_data.stringOf(alloc, "withoutValue")});
    std.debug.print("hungry: {s}\n", .{try sample_data.stringOf(alloc, "hungry")});

    // Demonstrate IsNullOf / IsNullAt
    std.debug.print("withoutValue is null? {}\n", .{sample_data.isNullOf("withoutValue")});
    std.debug.print("withoutValue is null? {}\n", .{sample_data.isNullAt(3)});
    std.debug.print("apple is null? {}\n", .{sample_data.isNullOf("apple")});
    std.debug.print("apple is null? {}\n", .{sample_data.isNullAt(1)});

    // IntOf
    std.debug.print("answer: {d}\n", .{sample_data.intOf("answer")});

    // SetNullAt, SetNullOf
    // Set "pi" to null
    try sample_data.setNullAt(0);
    // Set "answer" to null
    try sample_data.setNullOf("answer");

    // Show the changes:
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // Restore pi and apple:
    try sample_data.setNumberAt(0, "3.14");
    try sample_data.setNumberOf("answer", "42");

    // Show the changes:
    std.debug.print("{s}\n", .{try json.emit(alloc)});

    // Add a null value named "afterApple" just after "apple"
    try sample_data.addNullAt(2, "afterApple");

    // Add a boolean value just after "pi"
    try sample_data.addBoolAt(1, "afterPi", false);

    // Examine the changes..
    std.debug.print("{s}\n", .{try json.emit(alloc)});
}