第二次出现之前的一切 -

Question

I am trying to use Power Rename (within Power Toys from Microsoft) to rename a large number of files. I need to remove everything after the second occurrence of a - and keep the file extension of.pdf at the end. In other words, I want to only keep what is before the second - and the file extension of.pdf at the end

Here are three examples:

Tab 3-3-zo.pdf

Should be Tab 3-3.pdf

Tab 2-3-jk2.pdf

Should be: Tab 2-3.pdf

Tab 3-3-Yuwk-3-kls.pdf

Should be: Tab 3-3.pdf

I am having significant trouble trying to figure this out. Any help appreciated:)

Answer 1

You can use

/^([^-\n]*-[^=\n]*)-.*$/

Demo

If you want to capture the extension:

/^([^-\n]*-[^=\n]*)-.*?(\.\w+)$/

Demo 2

If you only want to match .pdf files (including .PDF ):

/^([^-\n]*-[^=\n]*)-.*?(?i)(\.pdf)$/

Demo 3

It is super unclear in your question, but you may mean this:

/^([^-\n]*-).*?(?i)(\.pdf)$/

Demo 4