返回给定 URL 中音频文件的最后一个文件夹名称

Question

我想返回 wav 文件所在的最后一个文件夹：

所以如果我们有这个 URL：

const dec = "https://langfox.ir/expect/sources/frozen_2019/the_beautiful_forest_version_1/are you enjoying your new frozen layer/1614282551749614446037f2253780f2f.wav";

我们应该准确返回：

你喜欢你的新冷冻层吗

我可以 substring url 但我无法正确找到 / 标志的索引...

 const dec = "https://langfox.ir/expect/sources/frozen_2019/the_beautiful_forest_version_1/are you enjoying your new frozen layer/1614282551749614446037f2253780f2f.wav" var mySubString = dec.substring( dec.lastIndexOf("/") - X, // X is something I can't find out dec.lastIndexOf("/") ); console.log(mySubString);

我们应该怎么做？

Answer 1

将我的评论转换为答案，以便将来的访问者轻松找到该解决方案。

您可以像这样进行split + splice操作：

 const dec = "https://langfox.ir/expect/sources/frozen_2019/the_beautiful_forest_version_1/are you enjoying your new frozen layer/1614282551749614446037f2253780f2f.wav"; var p = dec.split('/').slice(-2)[0]; console.log(p); //=> are you enjoying your new frozen layer

Answer 2

在最后一个反斜杠之前获取 substring 中反斜杠的索引：

 const dec = "https://langfox.ir/expect/sources/frozen_2019/the_beautiful_forest_version_1/are you enjoying your new frozen layer/1614282551749614446037f2253780f2f.wav" var mySubString = dec.substring( dec.substring(0, dec.lastIndexOf("/")).lastIndexOf("/")+1, dec.lastIndexOf("/") ); console.log(mySubString);