Build a hierarchic object. Used in collects().

deepset.js

function deepset(obj, hier, val, _i) {
        var k;

        if(!_i)
                _i = 0;
        k = hier[_i];
        if(!hier[_i + 1]) {
                if(obj[k] !== undefined) {
                        if(typeof obj[k] == "string")
                                obj[k] = [obj[k]];
                        obj[k].push(val);
                }
                else
                        obj[k] = val;
                return;
        }
        if(!obj[k])
                obj[k] = {};
        deepset(obj[k], hier, val, _i + 1);
}