Quickly set tab space size in vim

quicktab.vim

" With pathogen: place in ~/.vim/bundle/quicktab/plugin
" Without pathogen: place in ~/.vim/plugin

" Sets tab size to `size`.
function! QuickTabSet(size)
  let &tabstop = a:size
  let &softtabstop = a:size
  let &shiftwidth = a:size
  echo 'Changed tab size to '.a:size.' spaces'
endfunction

" Default bindings
map <silent> <Leader>4 :call QuickTabSet(4)<CR>
map <silent> <Leader>2 :call QuickTabSet(2)<CR>