api get multiple stats

/* GW2 API query tool for items - note this is a hideously large query, be kind to the api servers and don't use this more than you have to! */
// Function to convert an object variable into a table
function makeTableHTML(data, itemstats) {
    var result = '<table class="table mech1" style="margin-bottom:0px;"><tr><th>ID</th><th>Name</th><th>Level</th><th>Rarity</th><th>Prefixes</th></tr>';
    $.each(data, function(index, val) {
        var id = val['id'];
        var name = val['name'];
        var level = val['level'];
        var rarity = val['rarity'];
        var details = {};
        var stats = [];
        var prefixnamesstring = '';

        if (val.hasOwnProperty('details')){
            details = val['details'];
            if (details.hasOwnProperty('stat_choices')){
                stats = details['stat_choices'];
                var prefixnames = [];
                $.each(stats, function(i,prefixid) {
                    if (itemstats.hasOwnProperty(prefixid)) {
                        prefixnames.push(itemstats[prefixid]['name']);
                    } else {
                        prefixnames.push('UNKOWNPREFIX'+prefixid);
                    }

                });
                prefixnames.sort(function(a,b) {
                    return a > b;
                });
                prefixnamesstring = prefixnames.join(', ');
            }
        }
        if (stats.length < 2) {
            return;
        } else {
            result += '<tr><td>'+id+'</td><td>'+name+'</td><td>'+level+'</td><td>'+rarity+'</td><td>'+JSON.stringify(stats)+'</td><td>'+prefixnamesstring+'</td></tr>';
        }
    });
    result += '</table>';
    return result;
}

// Fetch all the possible itemsIDs
(function fetchAPIData() {
    $.getJSON('https://api.guildwars2.com/v2/itemstats?ids=all').done(function (itemstatstemp) {
        var itemstats = {};
        $.each(itemstatstemp, function(k,v) {
            // v.name = v.name.replace("'s","");
            itemstats[v.id] = v;
        });

    $.getJSON('https://api.guildwars2.com/v2/items').done(function (ids) {
        // var ids = [30704,30689];
        console.log('Number of items: ' + ids.length);

        // Query API until all the ids have been requested
        var promises = [], maxsize = 200;
        for (var i=0; i<ids.length; i+=maxsize) {
            var current_ids = ids.slice(i,i+maxsize).join(',');
            var promise = $.getJSON('https://api.guildwars2.com/v2/items?lang=en&ids='+current_ids);
            promises.push(promise);
        }

        // Wait until all the GET requests have finished
        $.when.apply($,promises).done(function() {
            // Ensure data is an object
            var newarguments = {};
            if ( promises.length > 1 ) {
                newarguments = arguments;
            } else {
                newarguments[0] = arguments;
            }

            // Concatenate data into data
            var data = {}
            $.each(newarguments, function(index, element){
                $.each(element[0], function(key, val){
                    data[val['id']] = val;
                });
            });

            // Write to console
            // console.log(data);

            // Write to document
            $('#apidata').html(makeTableHTML(data, itemstats));
        });
    });
    });
})();