返回給定 URL 中音頻文件的最后一個文件夾名稱

Question

我想返回 wav 文件所在的最后一個文件夾：

所以如果我們有這個 URL：

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

我們應該准確返回：

你喜歡你的新冷凍層嗎

我可以 substring url 但我無法正確找到 / 標志的索引...

 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);

我們應該怎么做？

Answer 1

將我的評論轉換為答案，以便將來的訪問者輕松找到該解決方案。

您可以像這樣進行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

在最后一個反斜杠之前獲取 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);