List Generator for Vim

" List Generator
" Barry Arthur, Jan 2012

" List(count, start, step)
"   count : number of list items (lines) to generate
"   start : starting number at head of list (default: 1)
"   step  : increment for each successive line (default: 1)
function! List(cnt, ...)
  let val = 1
  let inc = 1
  if a:0 > 0
    let val = a:1
    if a:0 > 1
      let inc = a:2
    endif
  endif
  exe "normal! " . a:cnt . "o"
  exe "'[,']s/^/\\=(((line('.')-line(\"'[\")+1)*inc)-(inc-val))/"
endfunction

command! -nargs=+ List call List(<f-args>)

finish

" examples:
"
" :List 5
"1
"2
"3
"4
"5
"
" :List 5 3
"3
"4
"5
"6
"7
"
" :List 5 3 4
"3
"7
"11
"15
"19
"
" :List 5 4 3
"4
"7
"10
"13
"16
"
" :List 5 101 101
"101
"202
"303
"404
"505