[1、js取整的方法,parseInt第二个参数是什么,数组转字符串的方法?](1%E3%80%81js%E5%8F%96%E6%95%B4%E7%9A%84%E6%96%B9%E6%B3%95%EF%BC%8CparseInt%E7%AC%AC%E4%BA%8C%E4%B8%AA%E5%8F%82%E6%95%B0%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%8C%E6%95%B0%E7%BB%84%E8%BD%AC%E5%AD%97%E7%AC%A6%E4%B8%B2%E7%9A%84%E6%96%B9%E6%B3%95%EF%BC%9F.md) [2、数组深拷贝方法](2%E3%80%81%E6%95%B0%E7%BB%84%E6%B7%B1%E6%8B%B7%E8%B4%9D%E6%96%B9%E6%B3%95.md) [3、改变this的方法,apply和call最初设计的时候为什么要设计这两个,为什么apply参数是数组call不是](3%E3%80%81%E6%94%B9%E5%8F%98this%E7%9A%84%E6%96%B9%E6%B3%95%EF%BC%8Capply%E5%92%8Ccall%E6%9C%80%E5%88%9D%E8%AE%BE%E8%AE%A1%E7%9A%84%E6%97%B6%E5%80%99%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E8%AE%BE%E8%AE%A1%E8%BF%99%E4%B8%A4%E4%B8%AA%EF%BC%8C%E4%B8%BA%E4%BB%80%E4%B9%88apply%E5%8F%82%E6%95%B0%E6%98%AF%E6%95%B0%E7%BB%84call%E4%B8%8D%E6%98%AF.md) [4、前端缓存方法,localstorage和sessionstorage可以跨域吗,cookie有哪些属性?](4%E3%80%81%E5%89%8D%E7%AB%AF%E7%BC%93%E5%AD%98%E6%96%B9%E6%B3%95%EF%BC%8Clocalstorage%E5%92%8Csessionstorage%E5%8F%AF%E4%BB%A5%E8%B7%A8%E5%9F%9F%E5%90%97%EF%BC%8Ccookie%E6%9C%89%E5%93%AA%E4%BA%9B%E5%B1%9E%E6%80%A7%EF%BC%9F.md) [5、跨域,强缓存协商缓存](5%E3%80%81%E8%B7%A8%E5%9F%9F%EF%BC%8C%E5%BC%BA%E7%BC%93%E5%AD%98%E5%8D%8F%E5%95%86%E7%BC%93%E5%AD%98.md) [6、常见性能优化手段](6%E3%80%81%E5%B8%B8%E8%A7%81%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96%E6%89%8B%E6%AE%B5.md) [7、说一下hashmap,常见数据结构](7%E3%80%81%E8%AF%B4%E4%B8%80%E4%B8%8Bhashmap%EF%BC%8C%E5%B8%B8%E8%A7%81%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84.md)