Reverse order of string inside brackets in vim

Question

Is there a neat way to reverse the string inside a certain type of brackets in vim, for instance

{1,2,3,4,5}

=>

{5,4,3,2,1}

?

Answer 1

How about this command?

:%s/{\zs\\(.\\{-}\\)\ze}/\= join(reverse(split(submatch(0), '\zs')), '')/g

Answer 2

The idea is to utilize the append feature of register by using upper-case register name.

To achieve this, you have to do some preparations:

• clean "a register: :let @a=""
• add a comma before the first element: {,1,2,3,4,5}
• put the cursor under } in normal mode

Ok, here we go:

• execute "AdF,, and press . to repeat until all elements are deleted.
• execute "aP to paste the reversed sequence, you will get: {,5,4,3,2,1}
• delete the first comma