Compare Json

Set the values of the category

JavaScript

var _jsonmeta = {};

    //Init category; Need to set each category from Product json
    var categories = [undefined,undefined,undefined];

    function checkForNullOrZero(categoryidarg, indexarg) {
        if (categoryidarg == null || typeof categoryidarg === 'undefined') {
            //ignore it if undefined
            console.log('Ignore: ' + categoryidarg);
        } else if (categoryidarg == 0) {
            //check the others because this category is 'None'
            console.log('Fall through to next: ' + _jsonmeta[indexarg]);
        } else {
            //check the hierarchy to see if this Area trumps the others
            console.log('Compare: ' + categoryidarg + ' vs ' + _jsonmeta[indexarg]);
            
            if (typeof categories[indexarg] === 'undefined') {
                console.log('Returning: ' + categoryidarg);
                return categoryidarg; //if undefined, set it.
            }
        }

        console.log('Returning: undefined');
        return categories[indexarg]; //undefined
    }

    function compareJson(json) {
        $.each(json, function (i, item) {
            //update if applicable
            categories[0] = checkForNullOrZero(item.c1, 0);

            categories[1] = checkForNullOrZero(item.c2, 1);

            categories[2] = checkForNullOrZero(item.c3, 2);
        });
    }

    _jsonmeta = [{
        "Product": 1,
        "c1": 1111,
        "c2": 1111,
        "c3": undefined
    }, {
        "Product": 2,
        "c1": 2222,
        "c2": 2222,
        "c3": undefined
    }];

    var categories = [undefined,undefined,undefined];
    compareJson(_jsonmeta)
    console.log('Category Results: ' + categories[0] + '|' + categories[1] + '|' + categories[2]); //c1:1111 c2:1111

    _jsonmeta = [{
        "Product": 1,
        "c1": 0,
        "c2": 0,
        "c3": undefined
    }, {
        "Product": 2,
        "c1": 2222,
        "c2": 2222,
        "c3": undefined
    }, {
        "Product": 3,
       ...