gistfile1.txt

const slicer = function (obj, list) {
    const keys = Object.keys(obj),
        output = {};
    let oIndex = keys.length,
        lIndex = list.length
    do {
        oIndex = oIndex - 1;
        do {
            lIndex = lIndex - 1;
            if (obj[list[lIndex]] !== undefined) {
                output[list[lIndex]] = obj[list[index]];
            }
        } while (lIndex > 0);
    } while (oIndex > 0);
    return output;
};