JW_ARR_KV

Documentation

API Reference

JW_ARR_KV

Description

Write a key and an array value into a JSON object. Intended for use within a JW_OBJ. Adds commas automatically.

Parameters

Name	Direction	Description
`j`	in,out	The target string to append to.
`k`	in	Key name for the array.
`arr`	in	A vector to iterate over.
`item`	out	Iterator variable for the current item.
`writer`	in	Code block that appends JSON for each `item`.

Usage example (from documentation)

  JW_ARR_KV(json, "tags", tag_vec, tag, {
      JW_STR(json, tag);
  });

Success

Appends a key-value array pair to json

Failure

Does not return on failure

Usage example (Cross-references)

Usage examples (Cross-references)

In Write.Nested.c:304:

    
        JW_OBJ(json, {
            JW_ARR_KV(json, "functions", functions, func, {
                JW_OBJ(json, {
                    JW_INT_KV(json, "id", func.id);

In Write.Nested.c:357:

            JW_INT_KV(json, "analysis_id", result.analysis_id);
            JW_STR_KV(json, "sha256", result.sha256);
            JW_ARR_KV(json, "tags", result.tags, tag, { JW_STR(json, tag); });
            JW_STR_KV(json, "created_at", result.created_at);
            JW_INT_KV(json, "model_id", result.model_id);

In Write.Nested.c:508:

    
        JW_OBJ(json, {
            JW_ARR_KV(json, "numbers", numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", strings, str, { JW_STR(json, str); });
            JW_ARR_KV(json, "booleans", booleans, b, { JW_BOOL(json, b); });

In Write.Nested.c:509:

        JW_OBJ(json, {
            JW_ARR_KV(json, "numbers", numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", strings, str, { JW_STR(json, str); });
            JW_ARR_KV(json, "booleans", booleans, b, { JW_BOOL(json, b); });
        });

In Write.Nested.c:510:

            JW_ARR_KV(json, "numbers", numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", strings, str, { JW_STR(json, str); });
            JW_ARR_KV(json, "booleans", booleans, b, { JW_BOOL(json, b); });
        });

In Write.EdgeCases.c:106:

    
        JW_OBJ(json, {
            JW_ARR_KV(json, "numbers", empty_numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", empty_strings, str, { JW_STR(json, str); });
        });

In Write.EdgeCases.c:107:

        JW_OBJ(json, {
            JW_ARR_KV(json, "numbers", empty_numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", empty_strings, str, { JW_STR(json, str); });
        });

In Write.EdgeCases.c:320:

                }
            );
            JW_ARR_KV(json, "list", empty_list, item, { JW_INT(json, item); });
            JW_OBJ_KV(json, "deep", {
                JW_OBJ_KV(

In Write.EdgeCases.c:366:

            );
            JW_OBJ_KV(json, "filled_obj", { JW_INT_KV(json, "x", x_value); });
            JW_ARR_KV(json, "empty_arr", empty_arr, item, { JW_INT(json, item); });
            JW_ARR_KV(json, "filled_arr", filled_arr, item, { JW_INT(json, item); });
        });

In Write.EdgeCases.c:367:

            JW_OBJ_KV(json, "filled_obj", { JW_INT_KV(json, "x", x_value); });
            JW_ARR_KV(json, "empty_arr", empty_arr, item, { JW_INT(json, item); });
            JW_ARR_KV(json, "filled_arr", filled_arr, item, { JW_INT(json, item); });
        });

In Write.Simple.c:247:

        VecPushBack(&languages, lang3);
    
        JW_OBJ(json, { JW_ARR_KV(json, "languages", languages, lang, { JW_STR(json, lang); }); });
    
        const char *expected = "{\"languages\":[\"C\",\"Python\",\"Rust\"]}";

In Write.Simple.c:322:

            JW_STR_KV(json, "name", product.name);
            JW_FLT_KV(json, "price", product.price);
            JW_ARR_KV(json, "tags", product.tags, tag, { JW_STR(json, tag); });
        });

In RoundTrip.c:375:

        Str json = StrInit();
        JW_OBJ(json, {
            JW_ARR_KV(json, "numbers", original_numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", original_strings, str, { JW_STR(json, str); });
        });

In RoundTrip.c:376:

        JW_OBJ(json, {
            JW_ARR_KV(json, "numbers", original_numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "strings", original_strings, str, { JW_STR(json, str); });
        });

In RoundTrip.c:550:

                JW_INT_KV(json, "timeout", original.config.timeout);
                JW_STR_KV(json, "log_level", original.config.log_level);
                JW_ARR_KV(json, "features", original.config.features, feature, { JW_STR(json, feature); });
            });
            JW_ARR_KV(json, "numbers", original.numbers, num, { JW_INT(json, num); });

In RoundTrip.c:552:

                JW_ARR_KV(json, "features", original.config.features, feature, { JW_STR(json, feature); });
            });
            JW_ARR_KV(json, "numbers", original.numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "flags", original.flags, flag, { JW_BOOL(json, flag); });
        });

In RoundTrip.c:553:

            });
            JW_ARR_KV(json, "numbers", original.numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "flags", original.flags, flag, { JW_BOOL(json, flag); });
        });

In RoundTrip.c:656:

        JW_OBJ(json, {
            JW_STR_KV(json, "empty_string", empty_str);
            JW_ARR_KV(json, "empty_numbers", empty_numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "empty_strings", empty_strings, str, { JW_STR(json, str); });
            JW_OBJ_KV(

In RoundTrip.c:657:

            JW_STR_KV(json, "empty_string", empty_str);
            JW_ARR_KV(json, "empty_numbers", empty_numbers, num, { JW_INT(json, num); });
            JW_ARR_KV(json, "empty_strings", empty_strings, str, { JW_STR(json, str); });
            JW_OBJ_KV(
                json,

Last updated on April 20, 2026

JW_ARR JW_BOOL