var weeks = [
    { "week": 15, "bugs": 6 },
    { "week": 16, "bugs": 12 },
    { "week": 17, "bugs": 23 },
    { "week": 18, "bugs": 13 },
    { "week": 19, "bugs": 10 },
    { "week": 20, "bugs": 11 },
    { "week": 21, "bugs": 11 },
    { "week": 22, "bugs": 2 },
    { "week": 15, "reopened": 1 },
    { "week": 16, "reopened": 1 },
    { "week": 17, "reopened": 2 },
    { "week": 18, "reopened": 4 },
    { "week": 19, "reopened": 3 },
    { "week": 20, "reopened": 1 },
    { "week": 21, "reopened": 4 },
    { "week": 22, "reopened": 1 },
    { "week": 15, "closed": 17 },
    { "week": 16, "closed": 35 },
    { "week": 17, "closed": 40 },
    { "week": 18, "closed": 34 },
    { "week": 19, "closed": 19 },
    { "week": 20, "closed": 29 },
    { "week": 21, "closed": 24 },
    { "week": 22, "closed": 1 }
];

var issues = [];

function mapWith(fn) {
    return function (list) {
        return Array.prototype.map.call(list, function (items) {
            return fn.call(this, items);
        });
    };
};

function arrange(items) {
    for (item in items) {
        if (issues[item]) {
            issues[item] = {
                week  : parseInt(item),
                issues: issues[item]
            };
        }
    }
    return issues.filter(function(){
        return true;
    });
};

var mapper = mapWith(function(item) {
    var week = item.week;
    delete item.week;
    issues[week] = issues[week] || {};
    var issue = Object.keys(item)[0];
    issues[week][issue] = item[issue];
    return issues;
});

arrange(mapper(weeks));