WJElement Example

The following JavaScript code...

    var doc = {
        "name": "Serenity",
        "class": "firefly",
        "crew": [
            {
                "name": "Malcolm Reynolds",
                "job": "captain",
                "born": 2468
            },
            {
                "name": "Kaywinnet Lee Fry",
                "job": "mechanic",
                "born": 2494
            },
            {
                "name": "Jayne Cobb",
                "job": "public relations"
                "born": 2485
            }
        ],
        "shiny": true
    };
    var person = null;

    for(i in doc.crew) {  // note: tedious...
        person = doc.crew[i];
        if(person.born == 2468) {
            person.born = 2486;
        }
    }
    delete(doc.shiny);

    for(i in doc.crew) {
        person = doc.crew[i];
        console.log(person.name +" ("+ person.job +") is "+ (2517 - person.born));
    }

    console.log(JSON.stringify(doc));

...is functionally the same as the following C code using WJElement:

    WJElement doc = NULL;
    WJElement person = NULL;

    doc = WJEObject(NULL, NULL, WJE_NEW);
    WJEString(doc, "name", WJE_SET, "Serenity");
    WJEString(doc, "class", WJE_SET, "firefly");
    WJEArray(doc, "crew", WJE_SET);

    WJEObject(doc, "crew[$]", WJE_NEW);
    WJEString(doc, "crew[-1].name", WJE_SET, "Malcolm Reynolds");
    WJEString(doc, "crew[-1].job", WJE_SET, "captain");
    WJEInt64(doc, "crew[-1].born", WJE_SET, 2468);

    WJEObject(doc, "crew[$]", WJE_NEW);
    WJEString(doc, "crew[-1].name", WJE_SET, "Kaywinnet Lee Fry");
    WJEString(doc, "crew[-1].job", WJE_SET, "mechanic");
    WJEInt64(doc, "crew[-1].born", WJE_SET, 2494);

    WJEObject(doc, "crew[$]", WJE_NEW);
    WJEString(doc, "crew[-1].name", WJE_SET, "Jayne Cobb");
    WJEString(doc, "crew[-1].job", WJE_SET, "public relations");
    WJEInt64(doc, "crew[-1].born", WJE_SET, 2485);

    WJEBool(doc, "shiny", WJE_SET, TRUE);

    WJEInt64(doc, "crew[].born == 2468", WJE_SET, 2486);  /* note: awesome! */
    WJECloseDocument(WJEGet(doc, "shiny", NULL));

    while((person = _WJEObject(doc, "crew[]", WJE_GET, &person))) {
        printf("%s (%s) is %d\n",
               WJEString(person, "name", WJE_GET, ""),
               WJEString(person, "job", WJE_GET, ""),
               2517 - WJEInt64(person, "born", WJE_GET, 0));
    }

    WJEDump(doc);
    WJECloseDocument(doc);

Notice how similar the code is both in length and clarity. In fact, using WJElement Selectors can make finding and manipulating JSON data even easier and faster in C than in JS!