Vim - mapping with an optional register prefix

Question

So I\'ve discovered that a common task for me in Vim is to PUT either to the start of the line or the end of the line. So my mapping could be:

nmap 

        

Answer 1

This is perfectly possible. I first I though this solution was possible: https://stackoverflow.com/a/290723/15934, but won't let us move the cursor as we wish, and normal can't be used.

Still, we can do this:

function! s:PutAt(where)
  "  appends, but  does not insert, hence the hack
  " with getline to build a list of what should be at the start of the buffer.
  let line = a:where ==1 
        \ ? [getreg(), getline(1)]
        \ : getreg()
  call setline(a:where, line)
endfunction

nnoremap  P :call PutAt(1)
nnoremap  p :call PutAt(line('$')+1)