<Leader>al to move down a line and insert delta of spaces

andy.vim

map <Leader>al :call MoveDownLine()<CR>

function! MoveDownLine()
  let cols=col('.')
  execute "normal! j"
  let next_cols=col('.')
  let delta_cols=cols-next_cols
  if(delta_cols > 0)
    if(next_cols==1)
      let delta_cols += 1
    endif

    execute "normal! " . delta_cols . "A "
  endif
endfunction

Close, but I actually wanted the line to move. I ended up with this, thanks only to you giving me a head start. Thoughts?

map <Leader>al :call MoveDownLine()<CR>

function! MoveDownLine()
  let cols=col('.')
  execute "normal! Do"

  let next_cols=col('.')
  let delta_cols=cols-next_cols

  if(delta_cols > 0)
    execute "normal! " . delta_cols . "A "
  endif

  execute "normal! p"
endfunction

When it comes to Vimscript stuff, my thoughts usually end up at "if it works, it works!" since it's hard to test and things this small don't really have a way of doing it "right" that I know of. Looks good to me! 👍

Slightly more fancy?

map <Leader>o :call MoveLine('o', 'k')<CR>
map <Leader>O :call MoveLine('O', 'j')<CR>

function! MoveLine(open_motion, post_motion)
  let cols=col('.')
  execute "normal! D" . a:open_motion

  let next_cols=col('.')
  let delta_cols=cols-next_cols

  if(delta_cols > 0)
    execute "normal! " . delta_cols . "A "
  endif

  execute "normal! p" . a:post_motion
endfunction

Nice!