比 for 循环好看点儿,哈哈

function namespace(oNamespace, sPackage) {
    let keys = sPackage.split('.')

    keys.reduce((currentObj, key) => {
        if(typeof currentObj[key] != 'object') {
            currentObj[key] = {}
        }
        return currentObj[key];
    }, oNamespace)

    return oNamespace
}