Question

Hi I have a script which batch converts pdfs into a series of images, what I’d like to do is count the total number of files in the directory that have the extension .jpg.

So far I have

for (file <- new File(path).listFiles) {

     /* DO SOMETHING */

}

Is there a compact way of doing this without looping through each file?

Thanks in advance, much appreciated 🙂

Answer 1

How about:

Option(new File(path).list).map(_.filter(_.endsWith(".jpg")).size).getOrElse(0)

Option(...) acts as a null check and is needed because list and listFiles may return null.