// 常规解法

function namespace(oNamespace, sPackage) {
    const packages = sPackage.split('.')
    let temp = oNamespace
    for (let idx in packages) {
        if(temp[packages[idx]] === undefined) {
            temp[packages[idx]] = {}
        }
        temp = temp[packages[idx]]
    }
    return oNamespace
}

// 使用reduce

function namespace(oNamespace, sPackage) {
    sPackage.split('.').reduce((acc,cur) => {
        return typeof acc[cur] === 'object' ? acc[cur] : acc[cur] = {}
    }, oNamespace)
}